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  • 151.
    Alm, Kalle
    Linköping University, Department of Management and Engineering, Law and Legal Philosophy. Linköping University, Faculty of Arts and Sciences.
    Konsultens ansvar för skada på byggnad med oventilerad fasad2012Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    During the later part of the 1900´s and the early part of the 21st century an increasing number of Swedish buildings have sustained damages because of moisture. These damages can be traced back to the usage of the ”Exterior Insulation and finishing system” or ”EIFS” when constructing the outer facade. The main problem when using the EIFS method, is that the facade becomes very susceptible towards moisture. The issue with moisture was completely unknown to the Swedish construction industry, until 2007, when a report from the Swedish National Testing Institute (SP) was released which addressed the problems. The question now arises who, in the construction industry, is to be held liable for these damages.

    In accordance with the standardized contracts that are being used in the construction industry, a fault for which the contractor is liable, only occurs if the contractor has built the construction in such a way that is not in compliance with the contract established between the parties, e.g. the construction differs from blue prints etc. This means that the contractor only is liable for damages which have occurred due to the contractors failure to build the construction in accordance with the contract. Therefore it is of importance to investigate whether the building designer is liable or not. The standardized contracts used for building designers, only regulate the outer limits of the designer ´s liability. Therefore it becomes very important to analyse what the designer has to have done in order to fulfil his duties as a professional. If the designer has not acted in accordance with the duties that are incumbent upon him as a professional, it is reasonable to believe that he has been negligent when designing a facade with the EIFS-method.

    The thesis aims to present the duties that are incumbent upon the designer as a professional, and to determine whether the designer has fulfilled these duties when designing a building using the EIFSmethod. The thesis also aims to investigate whether the designer can be held liable towards other parties than the contracting party.

  • 152.
    Alm, Torbjörn
    Linköping University, Department of Management and Engineering, Industrial ergonomics . Linköping University, The Institute of Technology.
    How to Put the Real World into a 3D Aircraft Display2001In: Proceedings of People in Control: An International Conference on Human Interfaces in Control Rooms, Cockpits and Command Centres 19-21 June, 2001Conference paper (Refereed)
  • 153.
    Alm, Torbjörn
    Linköping University, Department of Management and Engineering, Industrial ergonomics . Linköping University, The Institute of Technology.
    Simulator-Based Design: Methodology and vehicle display application2007Doctoral thesis, monograph (Other academic)
    Abstract [en]

    Human-in-the-loop simulators have long been used in the research community as well as in industry. The aviation field has been the pioneers in the use of simulators for design purposes. In contrast, corresponding activities in the automotive area have been less widespread. Published reports on experimental activities based on human-in-the-loop simulations have focused on methods used in the study, but nobody seems to have taken a step back and looked at the wider methodological picture of Simulator-Based Design. The purpose of this thesis is to fill this gap by drawing, in part, upon the author’s long experience in this field.

    In aircraft and lately also in ground vehicles there has been a technology shift from pure mechanics to computer-based systems. The physical interface has turned into screen-based solutions. This trend towards glass has just begun for ground vehicles. This development in vehicle technology has opened the door for new design approaches, not only for design itself, but also for the development process. Simulator-Based Design (SBD) is very compatible with this trend. The first part of this thesis proposes a structure for the process of SBD and links it to the corresponding methodology for software design.

    In the second part of the thesis the focus changes from methodology to application and specifically to the design of three-dimensional situation displays. Such displays are supposed to support the human operator with a view of a situation beyond the more or less limited visual range. In the aircraft application interest focuses on the surrounding air traffic in the light of the evolving free-flight concept, where responsibility for separation between aircraft will be (partly) transferred from ground-based flight controllers to air crews. This new responsibility must be supported by new technology and the situational view must be displayed from the perspective of the aircraft. Some basic design questions for such 3D displays were investigated resulting in an adaptive interface approach, where the current situation and task govern the details of information presentation.

    The thesis also discusses work on situation displays for ground vehicles. The most prominent example may be the Night Vision system, where the road situation ahead is depicted on a screen in the cab. The existing systems are based on continuous presentation, an approach that we have questioned, since there is strong evidence for negative behavioral adaptation. This means, for example, that the driver will drive faster, since vision has been enhanced, and thereby consume the safety margins that the system was supposed to deliver. Our investigation supports a situation-dependant approach and no continuous presentation.

    In conclusion, the results from our simulator-based studies showed advantages for adaptive interface solutions. Such design concepts are much more complicated than traditional static interfaces. This finding emphasizes the need for more dynamic design resources in order to have a complete understanding of the situation-related interface changes. The use of human-in-the-loop simulators and deployment of Simulator-Based Design will satisfy this need.

  • 154.
    Alm, Torbjörn
    et al.
    Linköping University, Department of Management and Engineering, Industrial ergonomics. Linköping University, The Institute of Technology.
    Alfredson, Jens
    Linköping University, Department of Management and Engineering, Industrial ergonomics. Linköping University, The Institute of Technology.
    Ohlsson, Kjell
    Linköping University, Department of Management and Engineering, Industrial ergonomics. Linköping University, The Institute of Technology.
    Business process reengineering in the automotive area by simulator-based design2007In: Simulation and Modeling: Current Technologies and Applications / [ed] Asim Abdel Rahman El Sheikh, Abid Al Ajeeli, Evon M. O. Abu-Taieh, Hershey, PA, USA: IGI-Global Inc. , 2007, 1, p. 337-358Chapter in book (Other academic)
    Abstract [en]

    The science of simulation and modeling (SM) strives to showcase the highest possible level of reality in order to determine the conditions necessary for optimal performance. SM is a multifaceted and complex field due to the numerous applications involved, particularly since SM applications range from nuclear reaction to supermarket queuing. Simulation and Modeling: Current Technologies and Applications includes examinations of current issues related to simulation such as: Web-based simulation, virtual reality, augmented reality, and artificial intelligence. This book combines different methods, views, theories, and applications of simulations into one volume, and offers insight into the computer science aspect of simulation and modeling while integrating the business practices of SM.

  • 155.
    Alm, Torbjörn
    et al.
    Linköping University, Department of Management and Engineering, Industrial ergonomics. Linköping University, The Institute of Technology.
    Kovordányi, Rita
    Linköping University, Department of Computer and Information Science, CSELAB - Cognitive Systems Engineering Laboratory. Linköping University, The Institute of Technology.
    Ohlsson, Kjell
    Linköping University, Department of Management and Engineering, Industrial ergonomics. Linköping University, The Institute of Technology.
    Continuous versus Situation-dependent Night Vision Presentation in Automotive Applications2006Conference paper (Refereed)
    Abstract [en]

    As the number of advanced driver assistance systems in modern cars increases the question of possible negative behavioral adaptation is raised. We have investigated this phenomenon for night vision systems in a driving simulator. One common opinion is that there is a risk for using the enhanced visual conditions that come with these systems to increase speed during nighttime driving and thereby eliminate the safety margins the system was designed to provide. In our study two system approaches were compared, one with continuous presentation and one with presentation only when dangerous objects were detected by the system. The latter approach was meant to minimize the risk of negative adaptation, which was partly confirmed in the study. Moreover, the results showed better and more consistent driver performance with the situation-dependent system and all subjects preferred this approach from a workload perspective.

  • 156.
    Alm, Torbjörn
    et al.
    Linköping University, Department of Management and Engineering. Linköping University, The Institute of Technology.
    Lif, Patrik
    Swedish Defence Research Agency, Linköping, Sweden.
    The Value of Spatial Cues in 3D Air Traffic Displays2007In: The International journal of aviation psychology, ISSN 1050-8414, E-ISSN 1532-7108, Vol. 17, no 2, p. 109-129Article in journal (Refereed)
    Abstract [en]

    Interest in implementing 3D pictorial displays for traffic information in aircraft has been prevalent for decades without any obvious implementation in the cockpit. Our research is focused on design issues for these displays. The purpose of the experiments discussed here was to investigate where and when additional spatial cues, e.g., drop-lines, could contribute to better performance and whether such additions could replace shifts between 2D and 3D presentation for different tasks. Our results show that drop-lines are beneficial in focused attention tasks but are not necessarily beneficial in more integrated tasks. This speaks to the need for an adaptive approach to the presentation of flight situation displays.

  • 157.
    Almgren, Richard
    Linköping University, Department of Management and Engineering. Linköping University, Faculty of Science & Engineering. Green Business AB.
    Näringslivets insatser på miljöområdet: För Naturvårdsverket2015Report (Other academic)
    Abstract [sv]

    Uppdraget för denna rapport har varit att beskriva näringslivets insatser på miljöområdet med avseende på vilka miljöfrågor som näringslivet prioriterar, hur företagen organiserar sina insatser och vilka verktyg de använder för att förbättra sin miljöprestanda, hur de ser på några vanliga statliga styrmedel, vilka som är de viktigaste drivkrafterna och hindren till förbättrad miljöprestanda samt att även blicka utanför Sveriges gränser.

    Generationsperspektivet, ungefär 3-års cykler, på miljöfrågorna innebär att det ofta tar lång tid innan ett miljöproblem uppenbarar sig som ett problem. Likaså tar det ofta lång tid att åtgärda upptäckta problem med hänsyn till att de ofta kräver omställningar med nya tekniska lösningar, som inte alltid finns till hands, och som också behöver inför as brett i näringslivet.

    När det gäller den första frågan om vilka de viktigaste miljöfrågorna är för näringslivets del visar denna studie att det främst gäller klimatfrågan och produkternas miljöaspekter i ett värdekedjeperspektiv. Båda frågorna är globala till sin karaktär. De studerade företagen har hög beredskap och har redan påbörjat arbetet att för svensk del bidra till att minska klimatpåverkan. Innebörden av de antagna målen hos de 50 studerade företagen är att företag som verkar i Sverige enligt denna studie ska kunna medverka till att nå den nivå på insatser som IPCC indikerat för år 2050. Det är den tidpunkt som IPCC siktar på i sina senaste utvärderingar. Flera företag har vardera skisserat en trovärdig färdplan för att göra verksamheten koldioxidsnål eller koldioxidneutral till nämnda tidpunkt. Det är känt från andra liknande studier att det f rån näringslivets perspektiv dock också behövs ett politiskt mål av flera skäl, bl a för att regeringar och näringsliv i alla länder ska dra åt samma håll. Det som emellertid är intressant nu är att näringslivet i Sverige enligt denna studie har påbörjat arbetet med att finna lösningar för att nå ett ev kommande politiskt globalt mål. De studerade företagen i Sverige har även i stor utsträckning upprättat egna mål och genomför åtgärder på de områden som de nationella miljökvalitetsmålen täcker, bl a med inriktning på att begränsa förorening av luft- och vattenområden men även på att värna den biologiska mångfalden i jord- och skogsbruk samt att värna och utveckla naturvärden i den bebyggda miljön. Resultaten i form av utsläppsminskningar på de föroreningsanknutna områdena är goda även om det på flera områden återstår insatser att göra. Miljökvaliteten i Sverige på dessa områden påverkas dock främst av verksamhet i länder utanför Sveriges gränser. Den miljöpåverkan som uppstår som följd av den ökade handeln mellan länder är idag svår av kvantifiera på grund brister i lämplig statistik och mätetal. Inriktningen av handeln pekar emellertid på att Sverige exporterar mer varor med goda miljöprestanda, räknat i hela värdekedjan, än importerar varor med dåliga. Utöver nämnda områden har företagen ofta mål för användning av resurser och utveckling av förnybara energikällor.

    När det gäller den andra frågan om företagens egna insatser visar studien att det i rapporten studerade delen av näringslivet i Sverige i betydande omfattning på frivillig väg har infört egna verktyg för att effektivt kunna hantera sina miljöfrågor. Den viktigaste förändringen är att begreppet hållbar utveckling nu har slagit rot. Det medför att miljöfrågorna nu fått en tydligare plats i företagens ledningar i samverkan med andra frågor inom begreppet hållbarhet. De viktiga förebilderna för innebörden av hållbar utveckling är UN Global Compact, OECDs vägledning för multinationella företag och den internationella standarden ISO 26000 om socialt ansvarstagande. Rapporteringen av studerade företagens insatser på hållbarhetsområdet sker i stor utsträckning enligt den modell som utarbetats av GRI (Global Reporting Initiative). Den egna målstyrda verksamheten baseras väsentligen på miljöledningssystem som upprättats med stöd av den internationella miljöledningsstandarden ISO 14001, inom vilken även lagstyrda insatser hanteras internt . Syftet med sådana miljöledningssystem är att bidra med en effektiv metod att hantera miljöfrågorna i ett företag. Den logik som denna standard har byggt upp, m ed målstyrning som viktigaste komponent, lyser igenom i alla företagens hållbarhetsredovisningar. Det är alltså tydligt att ISO 14001 har fått stort genomslag i den praktiska hanteringen av miljöfrågorna. Vidare är det tydligt att företagen idag fäster sto r vikt vid att värna och utveckla den biologiska mångfalden i skogen. Mer än 70 procent av den produktiva skogsmarken i Sverige är certifierad enligt något av de stora förekommande certifieringssystemen (FSC/PEFC). Det innebär omfattande åtaganden för skog sägarna att värna om den biologiska mångfalden och att sätta av marker för naturvårdsändamål.

    När det gäller den tredje frågan om näringslivets förhållningssätt till statliga styrmedel har näringslivet i Sverige generellt sett en positiv syn på det regel verk som reglerar deras verksamhet. Efterlevnaden synes vara god av gällande regler. Den statliga individuella, integrerade tillståndsprövningen anses av berörda företag vara ett bra styrmedel. Det gäller även den europeiska kemikalielagstiftningen REACH. Däremot framgår det tydligt av studien att den nuvarande utformningen av tillståndsprövningen enligt berörda företag efter hand har blivit alldeles för omständlig och tidsmässigt utdragen. Idag tar tillståndsprocessen över tre år i genomsnitt. Det bör tydliggöras att inget företag har yrkat på att sänka miljökraven i sig utan framförallt att få tillståndsprocessen att gå fortare. Studien visar att det finns flera sådana möjligheter utan att varken göra avkall på kraven i direktiv från EU eller hänsyn till miljön. Avgiften på kväveoxider har mer eller mindre förlorat sin roll som styrmedel och fungerar numera mest som subvention av energisektorn på bekostnad av skogsindustrin. Det är framförallt skogsindustrin som framför kritik på denna punkt. Vidare ans er berörda företag att handeln med utsläppsrätter enligt EU ETS bör utvidgas till ett globalt system för att kunna bli verkningsfullt.

    När det gäller den fjärde frågan om drivkrafter och hinder för förbättrad miljöprestanda var lagstiftningen den stora drivkraften under 1970- och 1980-talen. Olika marknadsbaserade krav har numera fått en betydligt större roll än tidigare. Kraften i dessa krav skiftar från bransch till bransch och från miljöfråga till miljöfråga. En notering som stödjer tesen om att marknad en tagit över är det faktum att även de i denna undersökning utvalda företag, som inte i någon påtaglig utsträckning styrs av lagstiftning, också har ambitiösa program och planer. En annan bild av samma utveckling är relationen till kunder och andra intressenter. Det framkommer av företagen i studien att de knappast idag kan verka på marknaden samtidigt som förtroendet för företaget sviktar hos kunder och andra intressenter. En viss reservation kan dock vara befogad. Bakom olika marknadsrelaterade krav står ofta myndighetskrav eller lagstiftning. Det motsatta gäller naturligtvis också, dvs bakom lagstiftningskrav finns ofta ytterst ett krav på marknaden. Vidare är det tydligt från studien att d en värdegrund som idag omfattar de flesta svenskar, att värna om miljön, gäller också för företag. Sverige är ett relativt homogent land med en i stora delar gemensam värdegrund. En betydande del av alla insatser för miljön görs därför på helt frivillig väg av ren omtanke om miljön. Också detta bekräftas av det faktum att även de företag som inte omfattas av statliga krav på tillstånd, anmälan eller andra ”skarpa krav” också vidtar åtgärder för att skydda miljön med liknande inriktning och omfattning som de med sådana krav.

    Genomgången av olika verktyg och styrmedel får konsekvenser för de statliga och kommunala myndigheterna. Olika statliga regelverk är inte längre är det enda svaret på förbättrad miljöprestanda hos näringslivet. Det innebär att miljöpolitiken för regering och myndigheter snarare bör vara att skaffa sig ett rimligt förhållningssätt till de olika initiativen på marknaden med innebörd att staten underlättar för och stödjer företag, snarare än reglerar. Efter genomgången i denna rapport är svaret entydigt nej på frågan om det behövs kompletterande styrmedel. Det saknas i varje fall miljömotiv för det.

    Informationen för att besvara frågorna i denna undersökning har främst hämtats från en grupp av 50 stora företag med verksamhet i Sverige. Därutöver har information inhämtat s från intervjuer (11 företag, varav 6 från gruppen av 50), andra tillgängliga undersökningar och litteratur. De 55 företagen utgör inte ett representativt urval av näringslivet idag. Däremot vet vi från tidigare undersökningar att den värdegrund och de insatser som de stora företagen gör efter hand verkar som inspiration för de mindre företagen. Många av de mindre företagen är också leverantörer till de stora och har krav fr ån kunden att förhålla sig till. Det de stora företagen gör idag förmodas vara giltiga för en större del av näringslivet om några år.

  • 158.
    Almgren, Richard
    et al.
    Linköping University, Department of Management and Engineering, Environmental Technology and Management. Linköping University, The Institute of Technology.
    Swanström, Lennart
    ABB AB, Corporate Research, SE-72178 Västerås, Sweden.
    Pagounis, Michail
    ABB Asea Brown Boveri Ltd.
    LIFE CYCLE MANAGEMENT THROUGH BUSINESS DRIVEN SUSTAINABILITY MANAGEMENT SYSTEMS: OPPORTUNITIES AND LIMITATIONS2013Conference paper (Other academic)
    Abstract [en]

    This paper is based on a study of the current sustainability management system landscape within the ABB Group and discusses the limitations and opportunities related to these systems and belonging tools. It also suggests a sustainability management model which covers both the “vertical” and “horizontal” directions along the value chain. The model describes how current management systems and tools can be better linked to the business strategy and decision situations to enable sustainable growth and profit while contributing to a “better world”. The main conclusions are that LCM needs to be explored further through the lenses of each company’s specific organization. Finally the role of a continual improvement procedure is considered the cornerstone for “true” life cycle implementation.

  • 159.
    Almlöf, Hanna
    Linköping University, Department of Management and Engineering, Commercial and Business Law. Linköping University, Faculty of Arts and Sciences.
    Aktiebolagsrätt i domstol: En rättsfallsstudie2018In: Juridisk Tidskrift, ISSN 1100-7761, E-ISSN 2002-3545, Vol. 2017/18, no 4, p. 785-801Article in journal (Other academic)
    Abstract [sv]

    I artikeln presenteras en rättsfallskartläggning över bolagsrättsliga domar vid Högsta domstolen eller hovrätterna i under 2013-2017. Studien visar bland annat att oaktat var du bor i Sverige är det lika stor sannolikhet för en aktiebolagsrättslig tvist, att talan i drygt hälften av målen riktas mot styrelseledamöter och att så mycket som en tredjedel av rättsfallen handlar om bolagsledningens personliga betalningsansvar. Studien ger också anledning att diskutera förekomsten och nyttan av empiriskt material inom rättsvetenskapen.

  • 160.
    Almlöf, Hanna
    Linköping University, Department of Management and Engineering, Commercial and Business Law. Linköping University, Faculty of Arts and Sciences.
    Mot en djupare förståelse av aktiebolagsrättens utformning2016In: Nordisk Tidsskrift for Selskabsret, ISSN 1399-140X, no 2-3, p. 108-122Article in journal (Other academic)
    Abstract [sv]

    I denna artikel presenterar hon en del av det regleringsteoretiska angreppssätt som används i studien och argumenterar för hur ökad kunskap om regleringstekniska verktyg kan leda till en djupare förståelse av aktiebolagsrättens utformning.

  • 161.
    Almlöf, Hanna
    Linköping University, Department of Management and Engineering, Commercial and Business Law. Linköping University, Faculty of Arts and Sciences.
    När dispositiva lagregler blir tvingande: om behov av kreativitet i det aktiebolagsrättsliga lagstiftningsarbetet2017In: Svensk Juristtidning, ISSN 0039-6591, no 1, p. 9-22Article in journal (Other academic)
    Abstract [sv]

    Genom dispositiv lagstiftning erbjuds en flexibilitet för parter som finner att lagens utgångspunkt inte passar deras kontrakt. Forskning visar dock att dispositiviteten många gånger inte utnyttjas. I denna artikel diskuteras ekonomiska och psykologiska skäl till varför aktieägare avstår från att avtala bort bolagsrättsliga regler, trots att andra lösningar hade passat deras företag bättre. Det sagda får till följd att dispositiva aktiebolagsrättsliga lagregler likväl blir tvingande och sättet för lagstiftaren att bemöta detta är genom att överväga en annan regleringsteknik.

  • 162.
    Almlöf, Hanna
    Linköping University, Department of Management and Engineering, Commercial and Business Law. Linköping University, Faculty of Arts and Sciences. Internationella Handelshögskolan i Jönköping.
    Om flexibelt beslutsfattande i aktiebolag2014In: Ny Juridik, ISSN 1400-3007, no 4, p. 63-79Article in journal (Other academic)
    Abstract [sv]

    Bolagsstämma per capsulam är bara början: med samtliga aktieägares samtycke är utrymmet för företagsspecifika lösningar större än vad lagtexten ger uttryck för. I denna artikel skriver Hanna Almlöf, jur.dr, universitetsadjunkt vid Linköpings universitet och forskare vid Ratio och CeFEO, om aktiebolagsrättens osynliga dispositivitet och möjligheter till flexibelt beslutsfattande i aktiebolag.

  • 163.
    Almlöf, Hanna
    et al.
    Linköping University, Department of Management and Engineering, Commercial and Business Law. Linköping University, Faculty of Arts and Sciences.
    Bjuggren, Per-Olof
    Jonkoping Int Business Sch, Sweden.
    A regulation and transaction cost perspective on the design of corporate law2019In: European Journal of Law and Economics, ISSN 0929-1261, E-ISSN 1572-9990, Vol. 47, no 3, p. 407-433Article in journal (Refereed)
    Abstract [en]

    For the corporate business model to be successful, it is important to align the interests of those who control and finance the firm. Corporate law has here an important task to fulfill. It offers a legal framework that can facilitate parties to conclude mutually preferable agreements at low transaction costs. The purpose of this paper is to show how to design corporate law to fulfill this task and apply this knowledge to a Swedish case. A two-dimension model that simultaneously considers both the regulation intensity and the level of default of corporate law is presented. The earlier literature treats these dimensions separately. By adding a transaction cost perspective to our model, we assess different regulatory techniques and examine how the Swedish legislation can be amended to help corporations by offering a standard contract that lowers the transaction costs of contracting. This can be achieved if default rules or standards of opt-out character are combined with other regulatory techniques with lower transaction costs such as opt-in alternatives and menus. We also show how our model can be used in other studies as a tool to analyze the design of legal rules.

  • 164.
    Almlöf, Hanna
    et al.
    Linköping University, Department of Management and Engineering, Commercial and Business Law. Linköping University, Faculty of Arts and Sciences. Internationella Handelshögskolan i Jönköping.
    Kristiansson, Hanna
    Dispens från de aktiebolagsrättsliga låneförbuden2019In: Svensk Juristtidning, ISSN 0039-6591Article in journal (Refereed)
    Abstract [sv]

    Ett aktiebolag får inte låna ut pengar till en person som är närstående till företaget, eller till en person som ska förvärva aktier i bolaget eller överordnat bolag i samma koncern. Det finns dock möjlighet att söka dispens från de aktiebolagsrättsliga låneförbuden. I denna artikel analyseras dispensförfarandet i detalj med stöd av en kartläggning av samtliga dispensärenden under fem år. Genomgången av myndighetspraxis visar av vem dispensmöjligheten utnyttjas och under vilka förutsättningar dispens medges, men också hur låneförbudens undantag tillämpas i praktiken, särskilt undantaget för kommersiella lån. Sammantaget visar studien att dispensmöjligheten troligtvis underutnyttjas.

  • 165.
    Almlöf, Hanna
    et al.
    Linköping University, Department of Management and Engineering, Commercial and Business Law. Linköping University, Faculty of Arts and Sciences. Internationella Handelshögskolan i Jönköping.
    Per-Olof, Bjuggren
    Ratio - Näringslivets forskningsinstitut, Stockholm.
    What Matters in Design of Corporate Law2017Other (Other academic)
    Abstract [en]

    For the corporate business model to be successful, it is important to align the interests of thosewho control and finance the firm. Corporate law has here an important task to fulfill. It offers alegal framework that can facilitate for parties to conclude mutually preferable agreements atlow transaction costs. The purpose of the paper is to show how to design corporate law to fulfillthis task. A two-dimension model that simultaneously considers both regulation intensity andthe level of default of the corporate law is presented. Earlier literature treats these dimensionsseparately. By adding a transaction cost perspective to our model, we assess different regulatorytechniques and examine how legislation can help corporations by offering a standard contractthat lowers transaction costs of contracting. This can be achieved through a legislation thatcovers most contingencies and take the heterogeneity of firms into consideration. Furthermore,default rules or standards of opt-out character should be combined with other regulatorytechniques with lower transaction costs such as opt-in alternatives and menus.

  • 166.
    Almoosawi, Somar
    Linköping University, The Institute of Technology, Faculty of Arts and Sciences, Department of Management and Engineering. Linköping University.
    Product Related Research Regarding Small and Medium Sized Enterprises, in Hong Kong and South China, Environmental Management Systems2008Independent thesis Advanced level (degree of Master), 20 points / 30 hpStudent thesis
    Abstract [en]

    This research was set out to understand the underlying causes for the lack of knowledgeregarding the environmental field in Hong Kong and South China and get a basic view of thedifficulties Environmental Management Systems (EMS) encounter when being put intopractice. Interviews and factory visits were used to collect data needed to build this report.The interviews had the aim to understand how companies in Hong Kong and China managetheir environmental related work. An EMS is a set of processes and practices that enable anorganization to reduce its environmental impacts and increase its operating efficiency, buthow was the use of such systems affecting the environmental work in reality.A total of eight persons from six different companies were interviewed. With the aim tounderstand how EMS were implemented and used from their point of view. The maindifficulty for the companies asked was the task of understanding and documenting theprocesses of ones own company. With differences such as language, culture, etc present thereis a need for a mutual ground. In the environmental field EMS are used as the commonground. Western companies are, because of the use of EMS, able to attain a picture of theenvironmental work and processes of their industrial partners in the China and Hong Kong.The result of this research shows that there still are many obstacles, for environmentalmanagement systems used by SME, left to address. There are cultural as well asinfrastructural problems that need to be addressed. It is therefore important to alter EMS inco ordinance with the Chinese social environment that it will be used in.

  • 167.
    Almqvist, Roland M.
    et al.
    Företagsekonomiska institutionen, Stockholms universitet.
    Graaf, Johan
    Företagsekonomiska institutionen, Stockholms universitet.
    Jannesson, Erik
    Linköping University, Department of Management and Engineering, Industrial Economics. Linköping University, Faculty of Science & Engineering.
    Parment, Anders
    Företagsekonomiska institutionen, Stockholms universitet.
    Skoog, Matti
    Företagsekonomi, Åbo akademi / Företagsekonomiska institutionen, Stockholms universitet.
    Boken om ekonomistyrning2016 (ed. 1)Book (Other academic)
    Abstract [sv]

    Denna bok ger en bred introduktion till ämnet ekonomistyrning. Boken speglar ekonomistyrningens relevans för dagens organisationer inom näringsliv, offentlig sektor och civilsamhälle. Författarna går igenom de grundläggande modeller, verktyg och processer som traditionell ekonomistyrning erbjuder. Här märks ekonomiska ansvarsenheter, resultat- och balansräkning, kassaflödesanalys, nyckeltal, belöningssystem, budgetering, kalkylering på kort och lång sikt, internpriser samt avvikelseanalys.

    Boken om ekonomistyrning utgår från att ekonomistyrningen har en central roll i att skapa mer hållbara organisationer och lägger betydande vikt vid aspekter som sociala och miljömässiga kostnader, projektstyrning, miljöinvesteringar och humankapital. Boken har därmed ett tydligt hållbarhets- och samhällsperspektiv.

    Författarna betonar även vikten av att ekonomistyrningen utgör en välavvägd helhet genom den så kallade styrmixen. En genomtänkt styrmix ger verktyg för att motivera medarbetare att arbeta mot gemensamma mål och skapa konkurrenskraftiga organisationer. Till boken finns ett rikt övningsmaterial i form av en övningsbok.

  • 168.
    Almroth, Per
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Engineering, Solid Mechanics . Linköping University, The Institute of Technology.
    Hasselqvist, M.
    Demag Delaval Indust. Turbomach. AB, Finspång.
    Simonsson, Kjell
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Engineering, Solid Mechanics .
    Sjöström, Sören
    Linköping University, Department of Management and Engineering, Solid Mechanics . Linköping University, The Institute of Technology.
    Viscoplastic-plastic modelling of IN7922004In: Computational materials science, ISSN 0927-0256, E-ISSN 1879-0801, Vol. 29, no 4, p. 437-445Article in journal (Refereed)
    Abstract [en]

    At high temperatures metallic materials behave in a viscous manner exemplified by strain rate dependence, stress relaxation and creep deformation. At low temperatures however, these effects are extremely small, and the behaviour is strain rate independent and shows no or very small relaxation effects. Finally there exists an intermediate region, in which the material behaviour is close to strain rate independent for high strain rates but at the same time shows time dependent inelastic effects, such as stress relaxation and creep. For IN792 this occurs at temperatures around 650 °C. The article describes the extension of a power-law viscoplastic model describing the behaviour of IN792 at 850 °C, also to describe the behaviour at 650 °C, by bounding the elastic-viscoplastic stress-space by a plastic yield surface. The model parameters have been estimated using data from creep test and tailored step relaxation tests, and the model fits well to both the step relaxation data aimed at resembling relevant component conditions and long term creep data. © 2003 Published by Elsevier B.V.

  • 169.
    Alne, Robert
    et al.
    Linköping University, Department of Management and Engineering, Business Administration. Linköping University, Faculty of Arts and Sciences.
    Hjelmberg, Mattias
    Linköping University, Department of Management and Engineering, Business Administration. Linköping University, Faculty of Arts and Sciences.
    Småbolag på den svenska aktiemarknaden: En kvantitativ studie om småbolagseffekten i kombination med andra investeringsstrategier2019Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Background: The goal of most investments is to achieve a high return at a low risk. Previous research has identified opportunities to exceed the market, which contradicts the efficient-market hypothesis. Investments in small enterprises have become increasingly popular in recent years, which raises the question of how an investment on these markets can be done successfully. Small company shares, and especially the smallest shares in terms of market value, are often associated with higher risk. This means that a study that investigates whether a risk-adjusted excess return is possible with the application of existing investment strategies is of relevance.

    Purpose: The aim of this study is to analyze whether there exists a small firm effect on the Swedish stock market between the years 2007-2019. The study also aims to investigate whether it is possible to generate risk-adjusted excess returns when investing in small companies and combine these investments with alternative strategies such as the momentum effect and relative valuation in terms of companies with low EV / EBITDA multiples.

    Methodology: The study was conducted with a quantitative methodology and a deductive design. Nine portfolios were designed with different company sizes and based on different investment strategies during the period 2007-2019 on the Swedish stock market. These portfolios have then been evaluated in terms of both returns and risk-adjusted returns and the results were then finally statistically tested through the implement of parwise t-tests.

    Conclusion: A small firm effect could not be observed on the Swedish stock market during the examined time period. The portfolios based on the companies with the lowest market value generated a significantly lower return than the benchmark index. Meanwhile, when applying the momentum effect and the strategy of low EV/EBITDA multiples on small companies, four out of four portfolios were found to generate a risk-adjusted excess return relative to the benchmark index. However, this excess return could not be statistically proven and could thus be the result of randomness.

  • 170.
    Alnefelt, Patrik
    et al.
    Linköping University, Department of Management and Engineering.
    Malmgren, Petra
    Linköping University, Department of Management and Engineering.
    Automated error reporting: Business-to-business aspects to consider for a software provider2009Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Computer errors are a constant problem for software providers. To completely avoid bugs has proven very difficult even though computer software goes through rigorous testing before released. One of the challenges for developers is recreating errors that end-users experience. User-submitted error reports can often be of help for developers to localize and fix bugs. However, the reports often vary in quality depending on the user's experience and the effort they put into writing the report. Instead of relying on manual error reports, some software providers have equipped their software with automated error reporting functionality. These programs are set to collect important information about the computer and the software in the event of a crash. There are pros and cons with both automated and manual error reporting.

    The research that has previously been done in the field of error reporting has mostly focused on the situation where private persons are senders and corporations are receivers. This report addresses the setting where both parties are corporations, which brings several new aspects to the problem. The five main topics this report focuses on are: customer attitude, which data to send, privacy, user interaction and feedback. A study has been conducted at the ERP system provider IFS in Sweden where interviews with employees and customers have been performed. Interviewees in the customer companies have been primarily ERP and application managers. The results of the study show that companies are less concerned than what the literature suggests even though the attitudes differ some depending on line of business. Conclusions are that a high degree of configurability of what is sent in the error reports and the level of user interaction is needed for companies to accept automated error reporting.

  • 171.
    Alriksson, Maria
    et al.
    Linköping University, Department of Management and Engineering.
    Aronsson, Lina
    Linköping University, Department of Management and Engineering.
    Cross-functional Co-operation for Improved Product Development: - a case study at Siemens Industrial Turbomachinery AB2007Independent thesis Advanced level (degree of Magister), 20 points / 30 hpStudent thesis
    Abstract [en]

    The purpose of this thesis is to identify and analyze relevant dimensions of cooperation between design and production related to product development. The study also focuses on suggesting improvements of the co-operation dimensions between production departments and the product development departments in the Product Development Process (PDP) at Siemens Industrial Turbomachinery AB (SIT AB). SIT AB produces gas and steam turbines. Their increasing production pace and increasing number of product development projects have highlighted the importance of improved co-operations between departments within the company.

    We have developed an analysis model including the dimensions of co-operation we found relevant for the study. These are Timing of Upstream – Downstream Activities; Richness & Quality of Information; Frequency of Information Transmission; Direction of Communication; Formalization of Communication; Organizational Support; Goal Optimization; Attitudes in Cross-functional Teams; and Understanding of Tasks.

    For product development SIT AB follows an extensive process; the PDP. This is a sequential process where all activities are performed in sequence and therefore it obstructs the implementation of Concurrent Engineering. Concurrent Engineering aims to shorten development time and to consider the total job as a whole by performing independent activities in parallel. Hence, we argue that SIT AB should work toward a more integrated process with more parallel activities.

    The performance in all the dimensions of co-operation differ between large and small projects since the co-operation in large projects work much better than in small projects due to better followed process description; more face-to-face discussions; a better balance between informal and formal communication; and more focus on project goals and team building.

    The improvement proposals are presented in a separate chapter as actions classified according to the potential impact on the organization and the estimated difficulty to implement them. The proposals include for example: training more project managers; initiate work shop practice for design engineers; and give more and better explanations of decisions and actions.

  • 172.
    Alsander, Anton
    et al.
    Linköping University, Department of Management and Engineering. Linköping University, Faculty of Arts and Sciences.
    Holmin Fridell, Jakob
    Linköping University, Department of Management and Engineering. Linköping University, Faculty of Arts and Sciences.
    Rutavdraget för läxhjälp: En studie av regeringens interventionslogik och nyckelpersoners uppfattningar i Linköpings kommun2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The main purpose of our paper is to reconstruct the intervention logic of the Swedish government's proposal to introduce a tax deduction for homework help. Furthermore, we also intend to outline the perceived impacts of this tax deduction in the municipality of Linköping. Our material consists of the government bill regarding the tax deduction, the parliamentary debate which preceded it as well as interviews with key people in the municipality of Linköping. In our study and in the light of Matthew Clarke’s theory of neo-liberalism within education policy, we also ask ourselves if the intervention logic behind the tax deduction and its perceived effects can be seen as a manifestation of neo-liberalism. To obtain our results, we have used Evert Vedung’s intervention logic model and side-effect model. The results are discussed in our analysis chapter which leads us to the conclusion that the tax deduction in some respects can be seen as a manifestation of neo-liberalism. The paper concludes with suggesting further research, in which we propose that the phenomenon should be investigated further and from different approaches. 

  • 173.
    Alsbjer, Markus
    Linköping University, Department of Management and Engineering, Energy Systems.
    Hur elpris och värmelast påverkar fjärrvärmesystem: fallet Göteborg Energi och Volvo Cars2009Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    This report observes the energy systems at Göteborg Energi and Volvo Cars, Torslanda. The systems are integrated as one system and the influence of different measures is evaluated. The main purpose is to reduce the total cost of the integrated system.

    This work use the power bonus method, a margin perspective view where all additional electricity production is calculated to replace condense power. The allocation for emissions at a combined heat and power plant is also calculated with the power bonus method.

    The data is simulated with the optimisation program Modest. Using computer models for the energy systems at Göteborg Energi and Volvo Cars the systems have been connected. The results from measures on one of the systems can be evaluated in the complete system.

    Evaluated measures using the computer models:

    • Electricity price raised to European levels
    • A connection between the district heating networks at Göteborg Energi and Volvo Cars
    • Conversions to district heating in Volvo Cars network

    Important conclusions in this report:

    • Raised electricity prices increases the profit vastly and reduces the global emissions for energy systems with combined heat and power production
    • Connecting two nearby district heating networks is profitable
    • Conversions to district heating at Volvo Cars is not profitable in the present situation but gains interest if electricity prices in Sweden increases to a European level
    • An electricity price on the present European level is enough to make the shadow prices for heat negative during the summer months if a combined heat and power plant is on the margin for heat production
  • 174.
    Altenberger, Lisa-Maria
    Linköping University, Department of Management and Engineering. Linköping University, Faculty of Arts and Sciences.
    The modern International Theatre State: North Korea's statehood, hereditary successions and its place in the international society2013Independent thesis Advanced level (degree of Master (Two Years)), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This thesis proposes an extended version of the ”theatre state” concept, originally coined by Clifford Geertz, as an alternative analysis of contemporary North Korean statehood and political rule.

    The DPRK is perhaps the only revolutionary, state-socialist entity to have survived the end of the Cold War with its original order intact, and to have undergone a hereditary succession of leadership twice, while withstanding remarkably adverse conditions. Today, Kim Jong-un is the third ruler in the Kim-dynasty, leaving the mode of charismatic rule and political imagery that characterise the North Korean regime largely unchanged. North Korea may therefore be the only state, apart from monarchies, to ever have achieved what Max Weber called the “routinization of charisma”.

    It is argued in this thesis that this continuity of revolutionary polity and charismatic authority was enabled by a conscious choice of the political elite to turn the DPRK into a type of theatre state – a political state directed towards the performance of ritual and spectacle in order to execute power, rather than the pursuit of more concrete ends such as welfare (cf. Kwon, Chung 2012: 45). Thereby, the charismatic authority of North Korea’s glorified leader Kim Il-sung was de-personalized and turned into a hereditary institution, but without becoming traditional or bureaucratic. This “theatre” was achieved through the mobilization of history, the dramatization of events, and the strategic use of symbols and rites. Cultural productions, the interactions of the leaders with the people and foreign diplomats, the use of global media platforms and photographs of the DPRK are analysed here as the expressions of the North Korean theatre, as well as the basis for the interpretations the Western audience conceives of it.

    Further, this thesis aims to show how such a theatre state functions as a discursive linchpin that influences regional distributions of power and contributes to the constitution of hegemonial structures. An international, interdependent perspective is hence added to the theatre state concept, in order to illustrate how “the spectacle” influences both the domestic society and the international “audience”.

    In face of the recent events concerning North Korea’s aggressive rhetoric towards its neighbours and the USA, this thesis aims to promote an alternative view of state power as theatrical performance, and to provide an analysis of North Korea’s role in regional and global politics.

  • 175.
    Altkvist, Mikaela
    et al.
    Linköping University, Department of Management and Engineering, Business Administration. Linköping University, Faculty of Arts and Sciences.
    Richardsson, Henrik
    Linköping University, Department of Management and Engineering, Business Administration. Linköping University, Faculty of Arts and Sciences.
    Hållbarhetsredovisning i stålbranschen: Att börja hållbarhetsredovisa med intressenternas behov i fokus2012Independent thesis Advanced level (degree of Master (One Year)), 20 credits / 30 HE creditsStudent thesis
    Abstract [en]

    Background: Following an increased awareness concerning social and environmental aspectsin society, more enterprises establish sustainability reports in order to inform theirstakeholders about the company’s sustainability duties. A previous study indicates that themetal sector is enjoying relatively limited increases in business opportunities and/or financialvalue of corporate responsibility. Another study suggests that there is a gap in expectationsbetween producers and users of sustainability reports due to an uncertainty regarding whatinformation such reports should contain and what audience such reports should target. Thequestion is whether or not a gap in expectations concerning sustainability reporting is acontributing factor to the limited increases in financial value in the metal sector?

    Purpose: The purpose of the study was to examine how a sustainability report should becarried out by a company in the steel industry given what information the company and thestakeholders consider as essential in a sustainability report.

    Methodology: To accomplish the purpose of the study, a deductive approach was used due tothe availability of suitable theories. We conducted semi-structured interviews in order toenable a deeper analysis of the subject. Interviews were carried out with employees at thesteel company Ovako in order to investigate what information they aim to communicate, themotivations for sustainability reporting, to whom the information is addressed and howcommunication with stakeholders is carried out. Four interviews with different stakeholders inthe Swedish steel industry were also conducted in order to study what information theyrequire for. The purpose was to highlight potential differences between the company and thestakeholders.

    Results: The study indicates the importance of clarifying the motives behind sustainabilityreporting and to identify which stakeholders to target. The importance stems from the fact thatthese factors decide what information to include. The case company identifies thestakeholders' expectations as their main motive and these should therefore form the basis forthe sustainability report. Both internal stakeholders such as employees and externalstakeholders as investors, customers and society are identified as important stakeholders bythe case company. The study further indicates that financial stakeholders without specificsustainability criteria do not place emphasis on the content of sustainability reports. Financialstakeholders with such criteria on the other hand, demand in particular informationconcerning environmental aspects, while non-financial stakeholders also requests informationon social aspects such as employee responsibility and business ethics. The case companydoes, however, show skepticism on whether social aspects such as employee responsibilityare relevant to include in the report due to the information's subjective nature and narrowaudience. The study indicates that the lack of stakeholder dialogues results in a sustainabilityreport that excludes information requested by stakeholders to whom the report is addressed.For a company in the steel industry, information concerning impact on the environment mayseem more relevant, but given the non-financial stakeholders demand the company shouldalso report on their social impact.

  • 176.
    Altrén, Jesper
    et al.
    Linköping University, Department of Management and Engineering.
    Lyth, Mattias
    Linköping University, Department of Management and Engineering.
    Solvency II - A compliance burden or an opportunity for the Swedish non-life insurance industry?2007Independent thesis Advanced level (degree of Magister), 20 points / 30 hpStudent thesis
    Abstract [en]

    Insurance companies and banks are of great importance to the economy, which is why their stability must be ensured. In order to prevent bankruptcies in the financial sector, these companies are subject to strict regulations, which set standards for risk management and the amount of reserve capital required. Such capital reserves act as safety buffers to protect the customers from extraordinary events. In the insurance industry, the reserve capital is referred to as the solvency margin.

    Solvency II is new set of insurance regulations that aims to set a common standard regarding solvency capital and risk management for insurance companies within the European Union. The potential costs and benefits of the regulations are of importance not only to insurance companies but also to those firms that offer services and products to the insurance industry in the field of risk management. Solvency II is often compared to the Basel II accord for banks, which had a strong business case in the way that banks could significantly lower their reserve capital and use it for other purposes. The question is, however, whether insurance companies can expect similar benefits from Solvency II.

    The purpose of this study is therefore to explain how the Solvency II regulations will affect risk management in the Swedish non-life insurance industry, and whether these changes can result in opportunities for insurance companies. This is achieved by studying the new regulations and conducting a number of interviews with insurance company representatives as well as industry experts. Four potential effects of Solvency II have been investigated: capital levels, insurance pricing, credit ratings and reinsurance.

    The findings of the study indicate that no obvious benefits related to the potential effects above can be realised by complying with Solvency II. The future capital requirements will come close to those already enforced by supervisors today, resulting in a minor change that can go both ways. Neither credit ratings nor reinsurance covers seem to become notably affected by Solvency II. As for insurance pricing, an increasingly sophisticated risk-based allocation of the cost of solvency capital provides the most notable opportunity of Solvency II, but at present, no conclusions can be drawn regarding the effects of such changes. On the other hand, Solvency II will put pressure on improving systems to ensure the quality and traceability of data.

    Thus, the actual changes in risk management practices are not expected to be substantial among Swedish non-life insurance companies, and it therefore seems unlikely that insurance companies would be willing to invest as heavily in reaching Solvency II compliance as banks have done in Basel II.

  • 177.
    Alvarez Zea, Maria
    et al.
    Linköping University, Department of Management and Engineering, Business Administration. Linköping University, Faculty of Arts and Sciences.
    Metro, Marissa
    Linköping University, Department of Management and Engineering, Business Administration. Linköping University, Faculty of Arts and Sciences.
    Unexpected Item in the Bagging Area: An Examination of Joint Recovery and Customer Satisfaction in Retail Self-Service2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    With the growth of self-service technologies in retail stores and services, service failure of the technology is seemingly inevitable. This has lead to the question of how these failures influence customers, specifically their satisfaction and loyalty. Customer satisfaction and loyalty drives businesses forward and gives them the competitive advantage.

    The aim of this bachelor thesis is to explore if joint recovery has outcomes in customer satsifaction and loyalty in retail self service technologies. Service recovery is an important factor when discussing self-service technology use in buisnesses and therefore this research aims to help further the knowledge and insights on this. The research questions therefore revolve around different aspects that affect customer satifaction and loyalty during service failure with SSTs (self-service technology).

    In order to fulfil the purpose and aim of this study, there has been a specific methodology chosen and explained that has been taken from the different theories chosen and prior peer-reviewed literature. The methodology revolves around the survey methodology and involves different research approaches and methods.

    The results of the study demonstrate that joint recovery has benefits in customer satisfaction and loyalty. Additionally, the study shows that organizations use of procedural justice will have an impact on customer satisfaction after service failure in retail self service technologies. Results also show that influencing factors for customers to participate in recovery are money and to improve the situation. New findings show that normal attribution behavior switches in retail self-service due to reccuring failure. These are the basis of the conclusions drawn from the research.

  • 178.
    Alvesson, Mats
    et al.
    Linköping University, Faculty of Arts and Sciences. Linköping University, Department of Management and Engineering, Business Administration. Företagsekonomi Lunds universitet.
    Lindkvist, Lars
    Linköping University, Faculty of Arts and Sciences. Linköping University, Department of Management and Economics, Business Administration.
    Transaction Costs, Clans and Corporate Culture.2004In: The International Library of the New Institutional Economics / [ed] Claude Ménard, Edward Elgar Publishing Ltd , 2004, p. -666Chapter in book (Other academic)
  • 179.
    Alvestig, Carl
    et al.
    Linköping University, Department of Management and Engineering, Information Systems.
    Jägerud, Filip
    Linköping University, Department of Management and Engineering, Information Systems.
    Man måste brinna för att bli utbränd: En kvalitativ studie om orsaker till stress samt dess påverkan på IT-projektledare och IT-projekt2017Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    Stress is a growing problem in today's society. Employees suffer from fatigue syndrome andare forced to suffer sick leave for longer periods, which entails costs for both the society andthe employer. Some occupational groups are more vulnerable to stress than others. In the ITindustry, development is very fast, which means that employees must constantly keep up withthe new developments in order to stay in the loop. A project manager has a big responsibilityon his shoulders to lead projects, in our case containing 50 project members, this may be evenmore in larger organizations. Projects of this type may also include large budgets and whensuch a project fails, it has major consequences. Where these two areas overlap, stressfulsituations will undeniably occur.In this paper we have investigated which specific situations are stressing project managers inIT projects, how they are affected by this stress and what what the impact is on the projectsthat they operate. The purpose of this is to prevent stress in the future as well as to show thatthis could be a widespread problem in this industry. This could help project managers to seekhelp if they know that they are not alone in having this problem.To investigate this we have conducted five interviews at two different organizations. Onepublic and one private, however, we will not make a deeper comparison regarding thisparticular aspect since our selection area is too small for that. The interviews weresemi-structured to allow follow-up questions and were conducted in accordance with thedramaturgical model. All respondents have extensive experience in project management inthe IT industry, and the majority currently work as project managers. The empirical data isthen analyzed in conjunction with previous research within stress as well as the project area.Our results show that all the project managers in our interviews feel stress and that the stressis periodical. There are periods, for example, if an unforeseen problem arises where stresslevels can be problematic. A respondent tells of a project leader colleague who was burnedout and where our respondent had to take over the project. But none of the respondents sawthe stress as a reason for a career change, they all plan to continue in the industry. One of themost important methods of counteracting stress that we draw attention to is to prioritize theirduties and perform them in a logical order instead of taking care of everything at once. Wealso discovered that smartphones increases the stress levels of project managers since theyalways carry their work with them in their pocket and thus have trouble relaxing in their sparetime.

  • 180.
    Alvestrand, Erika
    Linköping University, Department of Management and Engineering, Commercial and Business Law.
    Offentliggörande av regelbunden finansiell information hos svenska aktiemarknadsbolag: Kvartalsrapportens betydelse för en ändamålsenlig reglering2016Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
    Abstract [sv]

    Den svenska regleringen av regelbunden finansiell information återfinns i form av lag och självreglering och syftar till att säkerställa lika information till alla, ökat förtroende, ökad handelsaktivitet, ökad likviditet och långsiktig tillväxt på värdepappersmarknaden. Därtill syftar reglerna till en harmonisering på värdepappersområdet inom EU. På grund av de kostnader och den administrativa börda som kvartalsrapporter anses medföra för framförallt mindre företag, och på grund av de kortsiktiga investeringsstrategier rapporterna anses ge incitament till, har kraven på kvartalsrapporter i den svenska regleringen på senare år minskat. I förevarande uppsats besvaras frågan om ett avskaffat krav på kvartalsrapporter är ändamålsenligt utifrån ett samhällsekonomiskt nyttoperspektiv. Frågan besvaras genom analys av den svenska regleringen av offentliggörande av regelbunden finansiell information och av vilka konsekvenser ett avskaffat krav på kvartalsrapporter kan medföra. Vidare förs ett resonemang de lege ferenda om en ändamålsenlig reglerings utformning och innehåll. För att kunna dra slutsatser om hur företags rapportering påverkas av minskade krav på kvartalsrapporter genomförs dessutom en kvantitativ undersökning av kvartalrapporteringstrender och en kvalitativ undersökning av inställningen till kvartalsrapporter hos företag på Nasdaq Stockholm.

    Utifrån olika ekonomiska teorier om i vilken grad informationsgivning utjämnar informationsasymmetrier på värdepappersmarknaden, kan slutsatser dras om med vilken frekvens regelbunden finansiell information bör offentliggöras och hur omfattande informationen bör vara. Trots investerares oförmåga att processa information och handla rationellt, finns mycket som talar för att informationsgivning i form av kvartalsrapporter utjämnar informationsasymmetrier i viss mån. Kvartalsrapporter är vidare av betydelse på grund av den trygghet offentliggörandet ger investerare. En känsla av trygghet ökar förtroendet för marknaden, vilket är positivt för marknadens kvalité och likviditet. Därtill finns en risk för att ett avskaffat krav på kvartalsrapporter minskar informationsgivningen från svenska aktiemarknadsbolag, vilket kan påverka effektiviteten på värdepappersmarknaden övervägande negativt. Denna risk tillsammans med kvartalsrapporters betydelse för en fungerande värdepappersmarknad, medför att ett avskaffat krav på kvartalsrapporter inte är ändamålsenligt.

    Resultaten av, de för uppsatsen genomförda undersökningarna, visar dock att företagen anser att dagens krav på kvartalsrapporters innehåll är för detaljerade för framförallt mindre företag och med hänsyn till investerares oförmåga att processa information. Krav på innehållet i kvartalsrapporter bör sålunda ställas relativt lågt för alla företag för att informationsgivningen ska kunna anpassas till företagens unika förutsättningar. Resultaten av undersökningarna visar även att det finns en vilja att fortsätta offentliggöra kvartalsrapporter, även i avsaknad av reglerade krav, vilket talar för att det inte är nödvändigt att ställa höga krav på innehållet i kvartalsrapporter. Regleringen bör fokusera på kvalité snarare än kvantitet.

    För att säkerställa tillräcklig information, förutsebarhet och objektivitet bör en reglering av offentliggörande av regelbunden finansiell information ha utgångspunkt i en allmänt utformad lag, där generella krav på regelbunden finansiell information stadgas. Krav på kvartalsrapporter och dess innehåll bör regleras av självreglering för att på bästa sätt kunna ändras i takt med den snabba utvecklingen på värdepappersområdet.

  • 181.
    Alvestrand, Erika
    et al.
    Linköping University, Department of Management and Engineering, Commercial and Business Law. Linköping University, Faculty of Arts and Sciences.
    Sofie, Andersson
    Linköping University, Department of Management and Engineering, Commercial and Business Law. Linköping University, Faculty of Arts and Sciences.
    Den nya utformningen av 3:12-reglrna: Teoretiska konsekvenser2014Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The so-called 3:12-rules were introduced in connection with the tax reform in 1990/91 with the purpose to regulate the taxation for owners of closely held corporations (fåmansföretag). The main purpose of the rules is to prevent owners of closely held corporations from taking out dividend instead of wage to get tax benefits. From the beginning strict rules were introduced to minimize income-shifting. The strict rules resulted in undesirable consequences such as decreased growth in closely held corporations. Over the years, the rules got more generous in order to increase entrepreneurship and this trend has continued until the latest changes were introduced in 1st of January 2014.

    In the first part of this paper we elaborate on the background of the 3:12-rules and the development of the rules until today. We describe the motives for introducing the rules and the underling motives to the changes.

    In the analysis we investigate if the motives of 3:12-rules according to the lawmaker will be fulfilled with the help of the recently introduced changes. We conclude that the design of the rules is a complex task, whereas the difficulty lies in the consideration between both to benefit entrepreneurship and at the same time prevent income-shifting. We conclude that income-shifting cannot be prevented at the great expense of growth. We believe that the new changes that, introduced in the 1st of January 2014, could result in new ways to achieve income-shifting and will probably not drive growth. Examples of alternative ways to design the rules are included in our analysis. To solve the problematic situation regarding the 3:12-rules, we recommend a simpler system where the rules only include the smaller closely held corporations and promote growth to a greater extent.

  • 182.
    Alvfors, Per
    et al.
    Energiprocesser, Kungliga Tekniska Högskolan, KTH, Stockholm.
    Ellegård, Kajsa
    Linköping University, Department of Thematic Studies, Technology and Social Change. Linköping University, Faculty of Arts and Sciences.
    Harvey, Simon
    Energiteknik/Rymd-, geo- och miljövetenskap, Chalmers Tekniska högskola, Göteborg.
    Karlsson, Magnus
    Linköping University, Department of Management and Engineering, Energy Systems. Linköping University, Faculty of Science & Engineering.
    Moshfegh, Bahram
    Linköping University, Department of Management and Engineering, Energy Systems. Linköping University, Faculty of Science & Engineering.
    Palm, Jenny
    Linköping University, Department of Thematic Studies, Technology and Social Change. Linköping University, Faculty of Arts and Sciences.
    Söderström, Mats
    Linköping University, Department of Management and Engineering, Energy Systems. Linköping University, Faculty of Science & Engineering.
    Widén, Joakim
    Institutionen för teknikvetenskaper, Byggteknik, Uppsala universitet.
    Forskarskolan Program Energisystem: Kunskapsutveckling genom samverkanmellan teknik- och samhällsvetenskap: Slutrapport 2016, Forskningssyntes för konsortiet Byggnader i energisystem2016Report (Other academic)
    Abstract [sv]

    Denna rapport ger en kortfattad översikt och syntes av tvärvetenskapliga forskningsresultat från verksamheten i konsortiet Byggnader i energisystem inom forskarskolan Program Energisystem. Tonvikten ligger på tiden från forskarskolans start 1997 till dess 15-årsjubileum 2012, men hänvisningar görs även till forskning publicerad därefter. Utgångspunkten har varit att lyfta fram det tvärvetenskapliga inom forskningen för att visa hur forskarskolan har bidragit till tvärvetenskaplig kunskaps- och metodutveckling.

    I rapporten ges en översikt över fallstudier och avhandlingar inom konsortiet och de tvärvetenskapliga forskningsresultaten sammanfattas inom tre huvudsakliga tematiska områden: (1) Passivhus: boende och energieffektiva byggnadstekniker,

    (2) Energieffektivisering: processer och aktörer, samt (3) Energianvändning, vardagsaktiviteter och småskalig solenergi i hushåll. Tvärvetenskapliga metoder och resultat sammanfattas och utvecklingen av samarbeten och angreppssätt beskrivs. Rapporten avslutas med några sammanfattande reflektioner kring hur framgångsrik tvärvetenskaplig forskning bör bedrivas.

  • 183.
    Alvfors, Per
    et al.
    Energiprocesser, Kungliga Tekniska Högskolan, KTH, Stockholm.
    Ellegård, Kajsa
    Linköping University, Department of Thematic Studies, Technology and Social Change. Linköping University, Faculty of Arts and Sciences.
    Harvey, Simon
    Energiteknik/Rymd-, geo- och miljövetenskap, Chalmers Tekniska högskola, Göteborg.
    Karlsson, Magnus
    Linköping University, Department of Management and Engineering, Energy Systems. Linköping University, Faculty of Science & Engineering.
    Moshfegh, Bahram
    Linköping University, Department of Management and Engineering, Energy Systems. Linköping University, Faculty of Science & Engineering.
    Palm, Jenny
    Linköping University, Department of Thematic Studies, Technology and Social Change. Linköping University, Faculty of Arts and Sciences.
    Söderström, Mats
    Linköping University, Department of Management and Engineering, Energy Systems. Linköping University, Faculty of Science & Engineering.
    Widén, Joakim
    Institutionen för teknikvetenskaper, Byggteknik, Uppsala universitet.
    Forskarskolan Program Energisystem: Kunskapsutveckling genom samverkanmellan teknik- och samhällsvetenskap: Slutrapport 2016, Forskningssyntes för konsortiet Industriella energisystem2016Report (Other academic)
    Abstract [sv]

    Denna syntesrapport är en sammanfattning och analys av den forskning som bedrivits inom ramen för det Industriella konsortiet från år 1997 (konsortiets verksamhet startade 1999) inom ramen för forskarskolan Program Energisystem. Under denna tid har 25 doktorsavhandlingar och en licentiatavhandling producerats inom det Industriella konsortiet. Avhandlingarna sammanfattas och analyseras i denna syntesrapport och arbetet avgränsas då till att studera avhandlingarnas Problemområde, Verktyg/Metod/Teori, Systemgräns, studerad Sektor och Övergripande resultat. Vidare ges, med utgångspunkt från dessa forskningsresultat, förslag på fortsatt forskning för hållbara och effektiva energisystem.

    Många viktiga problemområden har studerats inom ramen för forskarskolans Industrikonsortium. Ett flertal avhandlingar behandlar möjligheter att minska utsläppen av växthusgaser från industrin och här har flera sektorer studerats, bland annat massa- och pappersindustrin, järn- och stålindustrin, kemiindustrin och oljeraffinaderiindustrin. Ett centralt tema i avhandlingarna är potentialer för energieffektivisering i industrisektorn, inte minst vid införande av bioraffinaderikoncept i framtiden. Här analyseras t.ex. tekniska potentialer, kostnadseffektivitet för energieffektiviseringsåtgärder, samt betydelsen av energiledning och styrmedel.

    I avhandlingarna har en mängd olika metoder och verktyg använts. Den i särklass mest använda vetenskapliga metoden är intervjuer (15) följt av scenarioanalys (10), dokumentstudier (9), simuleringsberäkningar (9), pinchanalys (9) och optimering (8). Fallstudiemetodik där mer än en metod används för att studera ett specifikt fall, t.ex. ett företag, förekommer i flera avhandlingar. En grundtanke i forskarskolan Program Energisystem har varit att forskaren måste vara medveten om att resultat från energisystemanalyser kan påverkas av vilka systemgränser som valts. I flertalet av Industrikonsortiets avhandlingar har Europas elsystem utgjort systemgräns då effekter av förändrad elanvändning eller elproduktion analyserats.

    Industrikonsortiets forskningsresultat visar på många intressanta slutsatser. Det påvisas att det finns energieffektiviseringspotentialer både i nya investeringar och i energiledningsåtgärder, som att justera driftsbetingelser för befintlig teknisk utrustning och ändra beteenden. Det konstateras också att energisamarbeten mellan industri och energibolag med syfte att öka användningen av industriell överskottsvärme i många fall är en hållbar lösning som minskar regioners behov av primärenergi och reducerar utsläppen av växthusgaser. Hinder mot sådana samarbeten kan vara att detta inte är en del av industrins kärnverksamhet. Det konstateras även att energisamarbeten mellan närliggande anläggningar i ett industrikluster kan leda till avsevärt större energieffektiviseringspotentialer än om var och en av de ingående industrierna arbetar enbart med interna åtgärder. Hinder mot denna typ av samarbete är brist på etablerade affärsmodeller. Forskningen visar på ett behov av fortsatta studier kring begreppet kärnverksamhet och dess påverkan på energifrågan i svensk industrin. Avskiljning och lagring av koldioxid (CCS) från industrin har studerats och här konstateras att denna lösning inte är ekonomiskt lönsam med dagens förutsättningar. Det rekommenderas därför att framtida forskning bedrivs för att studera vilka styrmedel som skulle behövas för att CCS ska bli ekonomiskt intressant för industrin. En annan viktig fråga är hur energitjänsteföretag ska formulera affärsmodeller och strategier kring CCS, samt hur de kan samarbeta med industrin för att på affärsmässiga grunder få till stånd CO2– avskiljning, transport och lagring. Även framtida forskning kring styrmedel, t.ex. energitjänster, för ökad energieffektivitet i industrisektorn förordas. Resultat från Industrikonsortiets avhandlingar visar att processintegrationsverktyget pinchanalys kan kombineras med optimeringsverktyg (i detta fall MIND) vid analys av industriella energisystem. Denna metodkombination ger intressanta resultat varför fortsatt forskning förordas kring kombinationer av olika processintegrationsmetoder. I flertalet avhandlingar har företagsdata använts som indata vid exempelvis modellering och processintegrationsstudier. Detta har accentuerat behovet av ett standardiserat protokoll vid insamling av företagsdata. Ett sådant protokoll kan öka reliabiliteten på indata och förslagsvis användas vid fallstudier.

    Avslutningsvis kan konstateras att trots närmare 20 års tvärvetenskaplig forskning mellan samhällsvetare och teknikvetenskaperna finns det fortfarande mycket mer att beforska och utveckla.

  • 184.
    Alvfors, Per
    et al.
    Energiprocesser, Kungliga Tekniska Högskolan, KTH, Stockholm.
    Ellegård, Kajsa
    Linköping University, Department of Thematic Studies, Technology and Social Change. Linköping University, Faculty of Arts and Sciences.
    Harvey, Simon
    Energiteknik/Rymd-, geo- och miljövetenskap, Chalmers Tekniska högskola, Göteborg.
    Karlsson, Magnus
    Linköping University, Department of Management and Engineering, Energy Systems. Linköping University, Faculty of Science & Engineering.
    Moshfegh, Bahram
    Linköping University, Department of Management and Engineering, Energy Systems. Linköping University, Faculty of Science & Engineering.
    Palm, Jenny
    Linköping University, Department of Thematic Studies, Technology and Social Change. Linköping University, Faculty of Arts and Sciences.
    Söderström, Mats
    Linköping University, Department of Management and Engineering, Energy Systems. Linköping University, Faculty of Science & Engineering.
    Widén, Joakim
    Institutionen för teknikvetenskaper, Byggteknik, Uppsala universitet.
    Forskarskolan Program Energisystem: Kunskapsutveckling genom samverkanmellan teknik- och samhällsvetenskap: Slutrapport 2016, Forskningssyntes för konsortiet Lokala och regionala energisystem2016Report (Other academic)
    Abstract [sv]

    Forskarskolan Program Energisystem har med sina fem deltagande forskningsavdelningar från Chalmers tekniska högskola, Linköpings universitet, KTH och Uppsala universitet varit banbrytande inom tvärvetenskaplig energisystemforskning och dess tre konsortier har spelat en viktig roll för forskarskolans utveckling. Konsortierna är inriktade på byggnader i energisystem, industriella energisystem samt lokala och regionala energisystem. I varje konsortium har doktorander och seniorer från minst två av de deltagande avdelningarna bedrivit tvärvetenskaplig forskning.

    I det lokala och regionala konsortiet har forskningsfrågorna kretsat kring aktörer och processer av betydelse för energisystemen i svenska kommuner, län och regioner. Inom konsortiet har frågeställningar om miljömässigt, socialt och ekonomiskt hållbara lokala och regionala energisystem bland annat studerats genom att analysera aktörers agerande och politiska processer inom de tekniska, ekonomiska och institutionella villkor som utgör begränsningar och möjligheter för energisystemen. En tydlig trend inom konsortiets forskning under forskarskolans arton år är att inriktningen gått i riktning från lokal till regional och från stationära till mobila energisystem. Den förskjutningen följer också den ökande betydelse som regioner i form av länsstyrelser har fått för samordningen av energi- och klimatplaneringen i Sverige under det senaste decenniet. Kommunerna har fortfarande en dominerande position genom den energirelaterade infrastruktur som de förfogar över men en förskjutning mot ett mer regionalt inflytande är tydlig.

    Totalt har 26 doktors- och en licentiatexamen avlagts av konsortiets doktorander och dessa alumner är nu verksamma inom energirelaterade verksamheter Sverige. Den främsta representationen finns inom myndigheter och akademier.

  • 185.
    Alvfors, Per
    et al.
    Energiprocesser, Kungliga Tekniska Högskolan, KTH, Stockholm.
    Ellegård, Kajsa
    Linköping University, Department of Thematic Studies, Technology and Social Change. Linköping University, Faculty of Arts and Sciences.
    Harvey, Simon
    Energiteknik/Rymd-, geo- och miljövetenskap, Chalmers Tekniska högskola, Göteborg.
    Karlsson, Magnus
    Linköping University, Department of Management and Engineering, Energy Systems. Linköping University, Faculty of Science & Engineering.
    Moshfegh, Bahram
    Linköping University, Department of Management and Engineering, Energy Systems. Linköping University, Faculty of Science & Engineering.
    Palm, Jenny
    Linköping University, Department of Thematic Studies, Technology and Social Change. Linköping University, Faculty of Arts and Sciences.
    Söderström, Mats
    Linköping University, Department of Management and Engineering, Energy Systems. Linköping University, Faculty of Science & Engineering.
    Widén, Joakim
    Institutionen för teknikvetenskaper, Byggteknik, Uppsala universitet.
    Forskarskolan Program Energisystem: Kunskapsutveckling genom samverkanmellan teknik- och samhällsvetenskap: Slutrapport 2016, Huvudrapport2016Report (Other academic)
    Abstract [sv]

    Idén att samhällsvetenskaplig och teknisk energisystemforskning måste vävas samman för att utveckla ny kunskap och få ökad samhällsnytta var utgångspunkt när Program Energisystem startade år 1997.

    Program Energisystem identifierade tidigt kärnvärden som visades vara viktiga framgångsfaktorer:

    • Energisystem med tyngdpunkt på användarsidan
    • Tvärvetenskaplig, universitets- och fakultetsöverskridande
    • forskning och forskarutbildning
    • Sammanhållen forskarskola
    • Finansiering av hela doktorandprojekt
    • Samarbeten i tematiska forskningsområden
    • Kontinuerlig tvärvetenskaplig utveckling
    • Långsiktig finansiering av samordningsstruktur

    Program Energisystems arbete har kännetecknats av:

    • Val av samhällsrelevanta projekt av hög vetenskaplig kvalitet
    • Gemensamma tvärvetenskapliga kurser och projektarbeten
    • Tvärvetenskaplig handledning
    • Kontinuerligt arbetande fora för diskussion
    • och kontakter över ämnesgränser
    • Forskningssamarbeten mellan seniorer i olika ämnen
    • Aktivt doktorand- och alumninätverk

    Forskarutbildningens målsättning har varit att utbilda bättre samhällsvetare

    och bättre ingenjörer, inte att göra samhällsvetare av ingenjörerna eller ingenjörer

    av samhällsvetarna.

    I den kontinuerliga utvecklingen av Program Energisystem har ett förtroendefullt samarbete utvecklats som möjliggjort kontinuerliga förbättringar av forskningen och forskarutbildningen.

    Arvet från Program Energisystem har förts vidare i den nya Forskarskola Energisystem. Forskarskola Energisystem har en delvis annan struktur men bygger innehållsmässigt vidare på centrala idéer från Program Energisystem. Det finns ett fortsatt stort behov av tvärvetenskaplig kunskapsutveckling på energiområdet som främst handlar om att förstå komplicerade samband och processer och hur dessa kan påverkas.

  • 186.
    Alvfors, Per
    et al.
    Energiprocesser, Kungliga Tekniska Högskolan, KTH, Stockholm.
    Ellegård, Kajsa
    Linköping University, Department of Thematic Studies, Technology and Social Change. Linköping University, Faculty of Arts and Sciences.
    Harvey, Simon
    Energiteknik/Rymd-, geo- och miljövetenskap, Chalmers Tekniska högskola, Göteborg.
    Karlsson, Magnus
    Linköping University, Department of Management and Engineering, Energy Systems. Linköping University, Faculty of Science & Engineering.
    Moshfegh, Bahram
    Linköping University, Department of Management and Engineering, Energy Systems. Linköping University, Faculty of Science & Engineering.
    Palm, Jenny
    Linköping University, Department of Thematic Studies, Technology and Social Change. Linköping University, Faculty of Arts and Sciences.
    Söderström, Mats
    Linköping University, Department of Management and Engineering, Energy Systems. Linköping University, Faculty of Science & Engineering.
    Widén, Joakim
    Institutionen för teknikvetenskaper, Byggteknik, Uppsala universitet.
    Forskarskolan Program Energisystem: Kunskapsutveckling genom samverkanmellan teknik- och samhällsvetenskap: Slutrapport 2016, Publikationer från Program Energisystem2016Report (Other academic)
    Abstract [sv]

    Det finns en omfattande publicering från Program Energisystem. Förutom 78 doktorsavhandlingar och 16 licentiatavhandlingar så har forskarstuderande och seniorer publicerat ytterligare minst 500 publikationer inom ramen för Program Energisystem.

    I denna rapport förtecknas dessa publikationer.

  • 187.
    Alvin Rydén, Henrik
    et al.
    Linköping University, Department of Management and Engineering, Economics.
    Sommarin, Sara
    Linköping University, Department of Management and Engineering, Economics.
    Divide and Conquer: An in-depth study of the impact of the Swedish Leniency Program on the creation of cartels in the construction industry2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Den här uppsatsen behandlar ämnena kartellbildning och eftergiftsprogrammet, samt byggbranschen. Syftet är att undersöka om det svenska eftergiftsprogrammet har förutsättningar för att avskräcka från kartellbildning i byggbranschen. För att undersöka detta kommer uppsatsen även att lyfta fram vilka förutsättningar som finns för karteller att verka i branschen. Med hjälp kartellteori identifieras faktorer som kan tänkas underlätta för karteller att verka, och med hjälp av eftergiftsteori kommer faktorer identifieras i programmet som kan tänkas hjälpa till att motverka kartellbildning. Med utgångspunkt i teorin och de faktorer som hittats kommer förhållandena i byggbranschen att undersökas.Vårt resultat visar att branschen i nuläget är relativt stabil med goda vinstmöjligheter och innehar inträdeshinder vilket tyder på att kartellbildning kan gynnas och att karteller troligen existerar i branschen. Resultatet visar även att eftergiftsprogrammet verkar ha möjligheter att avskräcka från kartellbildning genom att bidra med misstro mellan potentiella kartellmedlemmar. Dock verkar effekten bero på, åtminstone till viss del, antalet företag som överväger att ingå i ett samarbete. Att eftergiftsprogrammet är lika avskräckande i alla delar av branschen är alltså inte alls säkert. Vi kan framförallt förvänta oss att eftergiftsprogrammet “söndrar och härskar” bland de karteller med många medlemmar, och vilka verkar i de delar av byggbranschen som moderniserats.

  • 188.
    Alvors, Per
    et al.
    Kungl. Tekniska Högskolan, KTH, Stockholm.
    Arnell, Jenny
    Svenska Miljöinstitutet.
    Berglin, Niklas
    Innventia AB, Stockholm, Sweden.
    Björnsson, Lovisa
    Miljö- och energisystem, Lunds Tekniska Högskola, Lund.
    Börjesson, Pål
    Miljö- och energisystem, Lunds Tekniska Högskola, Lund.
    Grahn, Maria
    Department of Energy and Environment, Chalmers University of Technology, Sweden.
    Harvey, Simon
    Chalmers University of Technology, Dept. of Energy and Environment, Heat and Power Technology Division,Göteborg, Sweden.
    Hoffstedt, Christian
    Innventia AB, Stockholm, Sweden.
    Holmgren, Kristina
    Svenska Miljöinstitutet.
    Jelse, Kristian
    Svenska Miljöinstitutet.
    Klintbom, Patrik
    Volvo AB, Sweden.
    Kusar, Henrik
    Kemisk Teknologi, Kungliga Tekniska Högskolan, KTH, Stockholm.
    Lidén, Gunnar
    Department of Chemical Engineering, Lund University, Sweden.
    Magnusson, Mimmi
    Skolan för kemivetenskap, Kungliga Tekniska Högskolan, Stockholm.
    Pettersson, Karin
    Energi och miljö/Energiteknik, Chalmers Tekniska Högskola, Göteborg.
    Rydberg, Tomas
    Svenska Miljöinstitutet.
    Sjöström, Krister
    School of Chemical Science and Engineering, Kungliga Tekniska Högskolan, Stockholm.
    Stålbrand, Henrik
    Biokemi och Strukturbiologi, Lunds universitet, Lund.
    Wallberg, Ola
    Institutionen för kemiteknik, Lunds universitet, Lund.
    Wetterlund, Elisabeth
    Linköping University, Department of Management and Engineering, Energy Systems. Linköping University, The Institute of Technology.
    Zacchi, Guido
    Institutionen för kemiteknik, Lunds universitet, Lund.
    Öhrman, Olof
    Institutionen för samhällsbyggnad och naturresurser, Luleå Tekniska universitet.
    Research and development challenges for Swedish biofuel actors – three illustrative examples: Improvement potential discussed in the context of Well-to-Tank analyses2010Report (Other academic)
    Abstract [en]

    Currently biofuels have strong political support, both in the EU and Sweden. The EU has, for example, set a target for the use of renewable fuels in the transportation sector stating that all EU member states should use 10% renewable fuels for transport by 2020. Fulfilling this ambition will lead to an enormous market for biofuels during the coming decade. To avoid increasing production of biofuels based on agriculture crops that require considerable use of arable area, focus is now to move towards more advanced second generation (2G) biofuels that can be produced from biomass feedstocks associated with a more efficient land use.

    Climate benefits and greenhouse gas (GHG) balances are aspects often discussed in conjunction with sustainability and biofuels. The total GHG emissions associated with production and usage of biofuels depend on the entire fuel production chain, mainly the agriculture or forestry feedstock systems and the manufacturing process. To compare different biofuel production pathways it is essential to conduct an environmental assessment using the well-to-tank (WTT) analysis methodology.

    In Sweden the conditions for biomass production are favourable and we have promising second generation biofuels technologies that are currently in the demonstration phase. In this study we have chosen to focus on cellulose based ethanol, methane from gasification of solid wood as well as DME from gasification of black liquor, with the purpose of identifying research and development potentials that may result in improvements in the WTT emission values. The main objective of this study is thus to identify research and development challenges for Swedish biofuel actors based on literature studies as well as discussions with the the researchers themselves. We have also discussed improvement potentials for the agriculture and forestry part of the WTT chain. The aim of this study is to, in the context of WTT analyses, (i) increase knowledge about the complexity of biofuel production, (ii) identify and discuss improvement potentials, regarding energy efficiency and GHG emissions, for three biofuel production cases, as well as (iii) identify and discuss improvement potentials regarding biomass supply, including agriculture/forestry. The scope of the study is limited to discussing the technologies, system aspects and climate impacts associated with the production stage. Aspects such as the influence on biodiversity and other environmental and social parameters fall beyond the scope of this study.

    We find that improvement potentials for emissions reductions within the agriculture/forestry part of the WTT chain include changing the use of diesel to low-CO2-emitting fuels, changing to more fuel-efficient tractors, more efficient cultivation and manufacture of fertilizers (commercial nitrogen fertilizer can be produced in plants which have nitrous oxide gas cleaning) as well as improved fertilization strategies (more precise nitrogen application during the cropping season). Furthermore, the cultivation of annual feedstock crops could be avoided on land rich in carbon, such as peat soils and new agriculture systems could be introduced that lower the demand for ploughing and harrowing. Other options for improving the WTT emission values includes introducing new types of crops, such as wheat with higher content of starch or willow with a higher content of cellulose.

    From the case study on lignocellulosic ethanol we find that 2G ethanol, with co-production of biogas, electricity, heat and/or wood pellet, has a promising role to play in the development of sustainable biofuel production systems. Depending on available raw materials, heat sinks, demand for biogas as vehicle fuel and existing 1G ethanol plants suitable for integration, 2G ethanol production systems may be designed differently to optimize the economic conditions and maximize profitability. However, the complexity connected to the development of the most optimal production systems require improved knowledge and involvement of several actors from different competence areas, such as chemical and biochemical engineering, process design and integration and energy and environmental systems analysis, which may be a potential barrier.

    Three important results from the lignocellulosic ethanol study are: (i) the production systems could be far more complex and intelligently designed than previous studies show, (ii) the potential improvements consist of a large number of combinations of process integration options wich partly depends on specific local conditions, (iii) the environmental performance of individual systems may vary significantly due to systems design and local conditons.

    From the case study on gasification of solid biomass for the production of biomethane we find that one of the main advantages of this technology is its high efficiency in respect to converting biomass into fuels for transport. For future research we see a need for improvements within the gas up-grading section, including gas cleaning and gas conditioning, to obtain a more efficient process. A major challenge is to remove the tar before the methanation reaction.

    Three important results from the biomethane study are: (i) it is important not to crack the methane already produced in the syngas, which indicates a need for improved catalysts for selective tar cracking, (ii) there is a need for new gas separation techniques to facilitate the use of air oxidation agent instead of oxygen in the gasifier, and (iii) there is a need for testing the integrated process under realistic conditions, both at atmospheric and pressurized conditions.

    From the case study on black liquor gasification for the production of DME we find that the process has many advantages compared to other biofuel production options, such as the fact that black liquor is already partially processed and exists in a pumpable, liquid form, and that the process is pressurised and tightly integrated with the pulp mill, which enhances fuel production efficiency. However, to achieve commercial status, some challenges still remain, such as demonstrating that materials and plant equipment meet the high availability required when scaling up to industrial size in the pulp mill, and also proving that the plant can operate according to calculated heat and material balances. Three important results from the DME study are: (i) that modern chemical pulp mills, having a potential surplus of energy, could become important suppliers of renewable fuels for transport, (ii) there is a need to demonstrate that renewable DME/methanol will be proven to function in large scale, and (iii) there is still potential for technology improvements and enhanced energy integration.

    Although quantitative improvement potentials are given in the three biofuel production cases, it is not obvious how these potentials would affect WTT values, since the biofuel production processes are complex and changing one parameter impacts other parameters. The improvement potentials are therefore discussed qualitatively. From the entire study we have come to agree on the following common conclusions: (i) research and development in Sweden within the three studied 2G biofuel production technologies is extensive, (ii) in general, the processes, within the three cases, work well at pilot and demonstration scale and are now in a phase to be proven in large scale, (iii) there is still room for improvement although some processes have been known for decades, (iv) the biofuel production processes are complex and site specific and process improvements need to be seen and judged from a broad systems perspective (both within the production plant as well as in the entire well-to-tank perspective), and (v) the three studied biofuel production systems are complementary technologies. Futher, the process of conducting this study is worth mentioning as a result itself, i.e. that many different actors within the field have proven their ability and willingness to contribute to a common report, and that the cooperation climate was very positive and bodes well for possible future collaboration within the framework of the f3 center.

    Finally, judging from the political ambitions it is clear that the demand for renewable fuels will significantly increase during the coming decade. This will most likely result in opportunities for a range of biofuel options. The studied biofuel options all represent 2G biofuels and they can all be part of the solution to meet the increased renewable fuel demand.

  • 189.
    Amadori, Kristian
    Linköping University, Department of Management and Engineering, Machine Design. Linköping University, The Institute of Technology.
    Geometry Based Design Automation: Applied to Aircraft Modelling and Optimization2012Doctoral thesis, comprehensive summary (Other academic)
    Abstract [en]

    Product development processes are continuously challenged by demands for increased efficiency. As engineering products become more and more complex, efficient tools and methods for integrated and automated design are needed throughout the development process. Multidisciplinary Design Optimization (MDO) is one promising technique that has the potential to drastically improve concurrent design. MDO frameworks combine several disciplinary models with the aim of gaining a holistic perspective of a system, while capturing the synergies between different subsystems. Among all disciplines, the geometric model is recognized as playing a key role, because it collects most of the data required to any other disciplinary analysis. In the present thesis, methodologies to enable multidisciplinary optimization in early aircraft design phases are studied. In particular, the research aims at putting the CAD geometric model in the loop. This requires the ability to automatically generate or update the geometric model, here referred to as geometry-based design automation.

    The thesis proposes the use of Knowledge Based Engineering (KBE) techniques to achieve design reuse and automation. In particular, so called High Level CAD templates (HLCts) are suggested to automate geometry generation and updates. HLCts can be compared to parametric LEGO® blocks containing a set of design and analysis parameters. These are produced and stored in libraries, giving engineers or a computer agent the possibility to first topologically select the templates and then modify the shape of each template parametrically.

    Since parameterization is central to modelling by means of HLCts, a thorough analysis of the subject is also performed. In most of the literature on MDO and KBE two recurring requirements concerning the geometrical model are expressed: the model should be flexible and robust. However, these requirements have never been properly formulated or defined. Hence, in the thesis a mathematical formulation for geometry model robustness and flexibility are proposed. These formulations ultimately allow the performance of geometric models to be precisely measured and compared.

    Finally, a prototyping and validation process is presented. The aim is to quickly and cost-effectively validate analytical results from an MDO process. The proposed process adopts different manufacturing techniques depending on the size and purpose of the intended prototype. In the last part of the thesis, three application examples are presented. The examples are chosen from research projects that have been carried out at Linköping University and show how the proposed theoretical results have been successfully employed in practice.

    List of papers
    1. Automated Design and Fabrication of Micro Air Vehicles
    Open this publication in new window or tab >>Automated Design and Fabrication of Micro Air Vehicles
    2011 (English)In: Journal of Aerospace Engineering, ISSN 0893-1321, E-ISSN 1943-5525, Vol. 226, no 10, p. 1271-1282Article in journal (Refereed) Published
    Abstract [en]

    A methodology for an automated design and fabrication of micro-air vehicles (MAVs) is presented. A design optimization framework has been developed that interfaces several software systems to generate MAVs to optimally fulfil specific mission requirements. By means of amulti-objective genetic algorithm, families of MAVs are tailored with respect to objectives such as weight and endurance. The framework takes into consideration the airframe and aerodynamic design as well as the selection and positioning of internal components. The selection of propulsion system components is made from a database of off-the-shelf components. In combination with a three-dimensional printer, physical prototypes can be quickly manufactured. A validation of the framework results from flight tests of a real MAV is also presented.

    Place, publisher, year, edition, pages
    SAGE Journals online, 2011
    Keywords
    Micro Air Vehicle; multidisciplinary optimization; multi-objective optimization; genetic algorithm; CAD automation; design automation
    National Category
    Mechanical Engineering
    Identifiers
    urn:nbn:se:liu:diva-73107 (URN)10.1177/0954410011419612 (DOI)000312145300006 ()
    Available from: 2011-12-16 Created: 2011-12-16 Last updated: 2017-12-08Bibliographically approved
    2. Flexible and Robust CAD Models for Design Automation
    Open this publication in new window or tab >>Flexible and Robust CAD Models for Design Automation
    2012 (English)In: Advanced Engineering Informatics, ISSN 1474-0346, E-ISSN 1873-5320, Vol. 26, no 2, p. 180-195Article in journal (Refereed) Published
    Abstract [en]

    This paper explores novel methodologies for enabling Multidisciplinary Design Optimization (MDO) of complex engineering products. To realize MDO, Knowledge Based Engineering (KBE) is adopted with the aim of achieving design reuse and automation. The aim of the on-going research at Linköping University is to shift from manual modelling of disposable geometries to Computer Aided Design (CAD) automation by introducing generic high-level geometry templates. Instead of repeatedly modelling similar instances of objects, engineers should be able to create more general models that can represent entire classes of objects. The proposed methodology enables utilization of commercial design tools, hence taking industrial feasibility into consideration. High Level CAD templates (HLCt) will be proposed and discussed as the building blocks of flexible and robust CAD models, which in turn enables high-fidelity geometry in the MDO loop. Quantification of the terms flexibility and robustness is also presented, providing a means to measure the quality of the geometry models. Finally, application examples are presented in which the outlined framework is evaluated. The applications have been chosen from three ongoing research projects aimed at automating the design of transport aircraft, industrial robots, and micro air vehicles.

    Keywords
    Design automation, Multidisciplinary Design Optimization, Robustness, Flexibility, Knowledge-Based Engineering
    National Category
    Mechanical Engineering
    Identifiers
    urn:nbn:se:liu:diva-73108 (URN)10.1016/j.aei.2012.01.004 (DOI)000308122400003 ()
    Available from: 2011-12-16 Created: 2011-12-16 Last updated: 2017-12-08Bibliographically approved
    3. Development of a subscale flight testing platform for a generic future fighter
    Open this publication in new window or tab >>Development of a subscale flight testing platform for a generic future fighter
    2010 (English)Conference paper, Published paper (Refereed)
    Abstract [en]

    One branch of the current research in aircraft design at Linköping University is focused on fast concept evaluation in early design stages. This covers multidisciplinary optimization using tools of different level of complexity and low-cost subscale flight testing. In some cases a flight test will provide more answers than several computations ever could. In order to achieve this goal a methodology is required to allow fast creation of subscale flying concepts and to obtain as much reliable information as possible from the tests. The methodology is currently being developed. One important part of it is the scaling methodology and the imposed requirements on manufacturing. The present paper presents the latest subscale demonstrator from Linköping University that has been built as part of the study initiated by the Swedish Material Board on a Generic Future Fighter aircraft.

    Keywords
    subscale, demonstrator, flight testing
    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-62594 (URN)
    Conference
    27TH INTERNATIONAL CONGRESS OF THE AERONAUTICAL SCIENCES - ICAS 2010
    Available from: 2011-11-10 Created: 2010-11-30 Last updated: 2011-12-16Bibliographically approved
    4. Evaluation of Automatically Designed Micro Air Vehicles and Flight Testing
    Open this publication in new window or tab >>Evaluation of Automatically Designed Micro Air Vehicles and Flight Testing
    2010 (English)Conference paper, Published paper (Refereed)
    Abstract [en]

    The presented work is centered on the evaluation of Micro or Mini Air Vehicles (MAV) that have been automatically designed and manufactured. An in-house developed design framework uses several coupled computer software’s to generate the geometric design in CAD, a well as list of off the shelf components for the propulsion system, and computer code for autonomous flight ready to upload in the intended autopilot. The paper describes the experiences made so far regarding automation of the design process and of manufacturing. Furthermore, it presents results from evaluation and analysis of the optimization algorithm and flight testing, and from continuing work with the framework to achieve deeper understanding of the process and to fine-tune the design automation performance. The flight data is correlated to the predicted performances to validate the models and design process.

    Keywords
    Design automation, multidisciplinary optimization, MAV
    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-62584 (URN)
    Conference
    48th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, Orlando, Florida, Jan. 4-7, 2010
    Available from: 2011-11-10 Created: 2010-11-30 Last updated: 2011-12-16Bibliographically approved
    5. Use of Panel Code Modeling in a Framework for Aircraft Concept Optimization
    Open this publication in new window or tab >>Use of Panel Code Modeling in a Framework for Aircraft Concept Optimization
    2006 (English)In: 11th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, 6-8 September, Portsmouth, Virginia, USA, 2006, p. 7084-Conference paper, Published paper (Other academic)
    Abstract [en]

     

     

    In this study the use of a high-order panel code within a framework for aircraft concept design is discussed. The framework is intended to be a multidisciplinary optimization tool to be adopted from the very beginning of the conceptual design phase in order to define and refine the aircraft design, with respect to its aerodynamic, stability and control, structure and basic aircraft systems. The presented work is aimed at developing a module for aerodynamic analysis of concepts as a basis for a direct search optimization of the concept layout. The design criterion, used in the example presented here, is to minimize the maximum take-off weight required to fulfil the mission. Classic and simple equations are used together with the data generated by the panel code solver to calculate the aircraft’s performances. Weights are calculated by means of statistical group weight equations, but the weight could also be calculated from a CAD-model. The design of an Unmanned Combat Air Vehicle is used as test case for three different optimization algorithms: one gradient method based (Fmincon), one non-gradient based (Complex) and one Genetic Algorithm (GA). Comparison of results and performances shows that the Genetic Algorithm is best fitted for the specific problem, having the by far best hit rate, even if it is at a cost of longer computing time. The Complex algorithm requires less iterations and is also able to find the optimum solution, but with a worse hit rate, while Fmincon can not reach to a global optimum. The suggested optimized configuration for the aircraft is very similar to the Boeing X-45C and Northrop Grumman X-47B.

    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-13306 (URN)
    Available from: 2011-11-10 Created: 2008-05-21 Last updated: 2011-12-16Bibliographically approved
  • 190.
    Amadori, Kristian
    Linköping University, Department of Management and Engineering, Machine Design . Linköping University, The Institute of Technology.
    On Aircraft Conceptual Design: A Framework for Knowledge Based Engineering and Design Optimization2008Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    This thesis presents a design framework where analytical tools are linked together and operated from an efficient system level interface. The application field is aircraft conceptual design. Particular attention has been paid to CAD system integration and design optimization.

    Aircraft design is an inherently multidisciplinary process. The goal is to search for the design that, in the best of possible ways, fulfills the requirements. It is therefore desirable to be able to effectively investigate and analyze solutions from a variety of points of view, weighting together the results and gathering a general figure of merit. At the same time, increasing competition on a global market forces to shorten the design process and to reduce costs. Thus a system that allows a tight and efficient integration of different disciplines and improving data flow and storage plays a key role.

    Integrating a CAD system to the framework is of central relevance. The geometrical model includes most of the information; specific data, required to carry out particular analysis, can be extracted from it. This is possible adopting parametric associative models that are controlled from a spreadsheet user interface. Strategies for building CAD models with a very high degree of flexibility are presented. Not only the external shape can be changed, but also the internal structure can be completely modified. Structural elements can be added or removed, and their position and shaping changed.

    In this work the design of an Unmanned Aerial Vehicle is used as test case for comparing three different optimization algorithms. The presented framework is also used for automatically design Micro Aerial Vehicles, starting from a short list of requirements and ending with a physical prototype produced by a rapid prototyping machine.

    List of papers
    1. Use of Panel Code Modeling in a Framework for Aircraft Concept Optimization
    Open this publication in new window or tab >>Use of Panel Code Modeling in a Framework for Aircraft Concept Optimization
    2006 (English)In: 11th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, 6-8 September, Portsmouth, Virginia, USA, 2006, p. 7084-Conference paper, Published paper (Other academic)
    Abstract [en]

     

     

    In this study the use of a high-order panel code within a framework for aircraft concept design is discussed. The framework is intended to be a multidisciplinary optimization tool to be adopted from the very beginning of the conceptual design phase in order to define and refine the aircraft design, with respect to its aerodynamic, stability and control, structure and basic aircraft systems. The presented work is aimed at developing a module for aerodynamic analysis of concepts as a basis for a direct search optimization of the concept layout. The design criterion, used in the example presented here, is to minimize the maximum take-off weight required to fulfil the mission. Classic and simple equations are used together with the data generated by the panel code solver to calculate the aircraft’s performances. Weights are calculated by means of statistical group weight equations, but the weight could also be calculated from a CAD-model. The design of an Unmanned Combat Air Vehicle is used as test case for three different optimization algorithms: one gradient method based (Fmincon), one non-gradient based (Complex) and one Genetic Algorithm (GA). Comparison of results and performances shows that the Genetic Algorithm is best fitted for the specific problem, having the by far best hit rate, even if it is at a cost of longer computing time. The Complex algorithm requires less iterations and is also able to find the optimum solution, but with a worse hit rate, while Fmincon can not reach to a global optimum. The suggested optimized configuration for the aircraft is very similar to the Boeing X-45C and Northrop Grumman X-47B.

    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-13306 (URN)
    Available from: 2011-11-10 Created: 2008-05-21 Last updated: 2011-12-16Bibliographically approved
    2. A Framework for Aerodynamic and Structural Optimization in Conceptual Design
    Open this publication in new window or tab >>A Framework for Aerodynamic and Structural Optimization in Conceptual Design
    2007 (English)In: 25th AIAA Applied Aerodynamics Conference, 25-28 June, Miami, FL, USA, AIAA , 2007, p. 4061-Conference paper, Published paper (Other academic)
    Abstract [en]

    Aircraft design is an inherently multidisciplinary activity that requires different models and tools for various aspects of the design. At Linköping University a novel design framework is being developed to support the initial conceptual design phase of a new aircraft. In this work main attention has been paid to wing design, with respect to aerodynamic efficiency and loads, and to structural analysis. By linking together various modules via a user-friendly interface based on a spreadsheet, the framework allows multidisciplinary analysis and optimizations to be carried out. This paper will present the framework, give an overview of its development status and give an indication on the future work.

    Place, publisher, year, edition, pages
    AIAA, 2007
    Keywords
    Aircraft design, multi domain optimization
    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-13307 (URN)
    Available from: 2008-05-21 Created: 2008-05-21 Last updated: 2009-04-22
    3. Distributed Framework for Micro Aerial Vehicle Design Automation
    Open this publication in new window or tab >>Distributed Framework for Micro Aerial Vehicle Design Automation
    2008 (English)In: Proceedings from the 46th AIAA Aerospace Sciences Meeting and Exhibit, 7 - 10 January, Reno, NV, USA, AIAA , 2008, p. 140-Conference paper, Published paper (Other academic)
    Abstract [en]

    Micro or mini aerial vehicles are characterized by being simple and inexpensive to build, and due to their small size very important to optimize. They are also likely to be built in relatively small series and be tailored for the sensors and equipment available at the time of deployment. Therefore "design and build on demand" is very attractive, where a modular concept with a more or less automated design process is desirable. In this paper design automation of a Micro or Mini Aerial Vehicle (MAV) is demonstrated using a distributed design optimization framework that involves selections of components from a database of propulsion system equipment and geometrical shape optimization. The framework links together a CAD system, responsible for the aircraft shape generation, with a panel code for aerodynamic evaluations.

     

    Place, publisher, year, edition, pages
    AIAA, 2008
    National Category
    Engineering and Technology
    Identifiers
    urn:nbn:se:liu:diva-13308 (URN)978-1-62410-128-1 (ISBN)
    Conference
    46th AIAA Aerospace Sciences Meeting and Exhibit, 7 - 10 January, Reno, NV, USA
    Available from: 2008-05-21 Created: 2008-05-21 Last updated: 2012-10-17Bibliographically approved
  • 191.
    Amadori, Kristian
    et al.
    Linköping University, Department of Management and Engineering, Machine Design. Linköping University, The Institute of Technology.
    Jouannet, Christopher
    Linköping University, Department of Management and Engineering, Fluid and Mechanical Engineering Systems. Linköping University, The Institute of Technology.
    Berry, Patrick
    Linköping University, Department of Management and Engineering, Fluid and Mechanical Engineering Systems. Linköping University, The Institute of Technology.
    Development of a subscale flight testing platform for a generic future fighter2010Conference paper (Refereed)
    Abstract [en]

    One branch of the current research in aircraft design at Linköping University is focused on fast concept evaluation in early design stages. This covers multidisciplinary optimization using tools of different level of complexity and low-cost subscale flight testing. In some cases a flight test will provide more answers than several computations ever could. In order to achieve this goal a methodology is required to allow fast creation of subscale flying concepts and to obtain as much reliable information as possible from the tests. The methodology is currently being developed. One important part of it is the scaling methodology and the imposed requirements on manufacturing. The present paper presents the latest subscale demonstrator from Linköping University that has been built as part of the study initiated by the Swedish Material Board on a Generic Future Fighter aircraft.

  • 192.
    Amadori, Kristian
    et al.
    Linköping University, Department of Management and Engineering, Machine Design . Linköping University, The Institute of Technology.
    Jouannet, Christopher
    Linköping University, Department of Management and Engineering, Fluid and Mechanical Engineering Systems . Linköping University, The Institute of Technology.
    Krus, Petter
    Linköping University, Department of Management and Engineering, Machine Design . Linköping University, The Institute of Technology.
    A Framework for Aerodynamic and Structural Optimization in Conceptual Design2007In: 25th AIAA Applied Aerodynamics Conference, 25-28 June, Miami, FL, USA, AIAA , 2007, p. 4061-Conference paper (Other academic)
    Abstract [en]

    Aircraft design is an inherently multidisciplinary activity that requires different models and tools for various aspects of the design. At Linköping University a novel design framework is being developed to support the initial conceptual design phase of a new aircraft. In this work main attention has been paid to wing design, with respect to aerodynamic efficiency and loads, and to structural analysis. By linking together various modules via a user-friendly interface based on a spreadsheet, the framework allows multidisciplinary analysis and optimizations to be carried out. This paper will present the framework, give an overview of its development status and give an indication on the future work.

  • 193.
    Amadori, Kristian
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Engineering, Machine Design.
    Jouannet, Christopher
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Engineering, Fluid and Mechanical Engineering Systems.
    Krus, Petter
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Engineering, Machine Design.
    Aircraft Conceptual Design Optimization2008In: International Congress of the Aeronautical Sciences ICAS,2008, Stockholm, Sweden: ICAS , 2008Conference paper (Refereed)
    Abstract [en]

    Aircraft design is an inherently multidisciplinary activity that requires different models and tools for various aspects of the design. At Linköping University a novel design framework is being developed to support the initial conceptual design phase of new aircraft. By linking together various modules via a userfriendly spreadsheet interface, the framework allows multidisciplinary analysis and optimizations to be carried out. The geometrical model created with a high-end CAD system, contains all the available information on the product and thus it plays a central role in the framework. In this work great attention has been paid to techniques that allow creating robust yet highly flexible CAD models. Two different case studies are presented. The first one is a hypothetic wing-box design that is studied with respect to aerodynamic efficiency and loads, and to structural analysis. In this study two approaches were compared. In one case the wing-box design was optimized with a fixed number of structural elements, where only dimensions and position were allowed to change. Then the same wing-box was analyzed allowing also the number of structural elements to vary. Thus only the parts that are required are left and a more efficient design can be obtained. In the second case study a mission simulation is performed on a UAV-type aircraft. Required data for the simulation are gathered from the CAD model and from aerodynamic analysis carried out with PANAIR, a high order panel code. The obtained data are then used as inputs parameters for flight simulation in order to determined hydraulic systems characteristics.  

  • 194.
    Amadori, Kristian
    et al.
    Linköping University, Department of Management and Engineering, Machine Design. Linköping University, The Institute of Technology.
    Jouannet, Christopher
    Linköping University, Department of Management and Engineering, Fluid and Mechanical Engineering Systems. Linköping University, The Institute of Technology.
    Krus, Petter
    Linköping University, Department of Management and Engineering, Machine Design. Linköping University, The Institute of Technology.
    Use of Panel Code Modeling in a Framework for Aircraft Concept Optimization2006In: 11th AIAA/ISSMO Multidisciplinary Analysis and Optimization Conference, 6-8 September, Portsmouth, Virginia, USA, 2006, p. 7084-Conference paper (Other academic)
    Abstract [en]

     

     

    In this study the use of a high-order panel code within a framework for aircraft concept design is discussed. The framework is intended to be a multidisciplinary optimization tool to be adopted from the very beginning of the conceptual design phase in order to define and refine the aircraft design, with respect to its aerodynamic, stability and control, structure and basic aircraft systems. The presented work is aimed at developing a module for aerodynamic analysis of concepts as a basis for a direct search optimization of the concept layout. The design criterion, used in the example presented here, is to minimize the maximum take-off weight required to fulfil the mission. Classic and simple equations are used together with the data generated by the panel code solver to calculate the aircraft’s performances. Weights are calculated by means of statistical group weight equations, but the weight could also be calculated from a CAD-model. The design of an Unmanned Combat Air Vehicle is used as test case for three different optimization algorithms: one gradient method based (Fmincon), one non-gradient based (Complex) and one Genetic Algorithm (GA). Comparison of results and performances shows that the Genetic Algorithm is best fitted for the specific problem, having the by far best hit rate, even if it is at a cost of longer computing time. The Complex algorithm requires less iterations and is also able to find the optimum solution, but with a worse hit rate, while Fmincon can not reach to a global optimum. The suggested optimized configuration for the aircraft is very similar to the Boeing X-45C and Northrop Grumman X-47B.

  • 195.
    Amadori, Kristian
    et al.
    Linköping University, Department of Management and Engineering, Machine Design. Linköping University, The Institute of Technology.
    Lundström, David
    Linköping University, Department of Management and Engineering, Fluid and Mechatronic Systems. Linköping University, The Institute of Technology.
    Design Automation Framework for Micro Air Vehicles2009Conference paper (Other academic)
    Abstract [en]

    At Linköping University work has been done to automate the design process of Micro or Mini Air Vehicles. A design optimization framework that links together a CAD system for airframe design and panel code for aerodynamic design has been developed. This paper describes the experience made so far, and demonstrates a case study on fully automated design where a 3D printer is used for manufacturing.

  • 196.
    Amadori, Kristian
    et al.
    Linköping University, Department of Management and Engineering, Machine Design. Linköping University, The Institute of Technology.
    Lundström, David
    Linköping University, Department of Management and Engineering, Fluid and Mechatronic Systems. Linköping University, The Institute of Technology.
    Krus, Petter
    Linköping University, Department of Management and Engineering, Fluid and Mechatronic Systems. Linköping University, The Institute of Technology.
    Automated Design and Fabrication of Micro Air Vehicles2011In: Journal of Aerospace Engineering, ISSN 0893-1321, E-ISSN 1943-5525, Vol. 226, no 10, p. 1271-1282Article in journal (Refereed)
    Abstract [en]

    A methodology for an automated design and fabrication of micro-air vehicles (MAVs) is presented. A design optimization framework has been developed that interfaces several software systems to generate MAVs to optimally fulfil specific mission requirements. By means of amulti-objective genetic algorithm, families of MAVs are tailored with respect to objectives such as weight and endurance. The framework takes into consideration the airframe and aerodynamic design as well as the selection and positioning of internal components. The selection of propulsion system components is made from a database of off-the-shelf components. In combination with a three-dimensional printer, physical prototypes can be quickly manufactured. A validation of the framework results from flight tests of a real MAV is also presented.

  • 197.
    Amadori, Kristian
    et al.
    Linköping University, Department of Management and Engineering, Machine Design. Linköping University, The Institute of Technology.
    Lundström, David
    Linköping University, Department of Management and Engineering, Fluid and Mechanical Engineering Systems. Linköping University, The Institute of Technology.
    Krus, Petter
    Linköping University, Department of Management and Engineering, Fluid and Mechanical Engineering Systems. Linköping University, The Institute of Technology.
    Evaluation of Automatically Designed Micro Air Vehicles and Flight Testing2010Conference paper (Refereed)
    Abstract [en]

    The presented work is centered on the evaluation of Micro or Mini Air Vehicles (MAV) that have been automatically designed and manufactured. An in-house developed design framework uses several coupled computer software’s to generate the geometric design in CAD, a well as list of off the shelf components for the propulsion system, and computer code for autonomous flight ready to upload in the intended autopilot. The paper describes the experiences made so far regarding automation of the design process and of manufacturing. Furthermore, it presents results from evaluation and analysis of the optimization algorithm and flight testing, and from continuing work with the framework to achieve deeper understanding of the process and to fine-tune the design automation performance. The flight data is correlated to the predicted performances to validate the models and design process.

  • 198.
    Amadori, Kristian
    et al.
    Linköping University, The Institute of Technology. Linköping University, Department of Management and Engineering, Machine Design .
    Lundén, Björn
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Machine Design.
    Krus, Petter
    Linköping University, The Institute of Technology. Linköping University, Department of Mechanical Engineering, Machine Design.
    Using CAD-Tools and Aerodynamic Codes in a Distributed Conceptual Design Framework2007In: Aerospace Sciences Meeting and Exhibit,2007, USA: AIAA , 2007Conference paper (Refereed)
    Abstract [en]

    Aircraft design is an inherently multi-disciplinary activity that requires different models and tools for various aspects of the design. At Linköping University a novel design framework is being developed to support the initial conceptual design phase of a new aircraft. Different modules are included, each one addressed to analyze and evaluate different aspects of the airplane, such as its aerodynamics, its weight and structure, its sub systems and its performances. All modules are easily accessible from a user-friendly interface based on an Excel spreadsheet. The link between all modules is based on Service Oriented Architecture (SOA) and allows both distribution and integration of all functions. This paper will present the framework, give an overview of its development status and give an indication on the future work.

  • 199.
    Amadori, Kristian
    et al.
    Linköping University, Department of Management and Engineering, Machine Design. Linköping University, The Institute of Technology.
    Melin, Tomas
    Linköping University, Department of Management and Engineering, Fluid and Mechatronic Systems. Linköping University, The Institute of Technology.
    Staack, Ingo
    Linköping University, Department of Management and Engineering, Fluid and Mechatronic Systems. Linköping University, The Institute of Technology.
    Krus, Petter
    Linköping University, Department of Management and Engineering, Fluid and Mechatronic Systems. Linköping University, The Institute of Technology.
    Multidisciplinary Optimization of Wing Structure Using Parametric Models2013Conference paper (Other academic)
    Abstract [en]

    Aircraft design is an inherently multidisciplinary activity that requires integrating different models and tools to reach a well-balanced and optimized product. At Linköping University a design framework is being developed to support the initial design space exploration and the conceptual design phase. Main characteristics of the framework are its flexible database in XML format, together with close integration of automated CAD and other tools, which allows the developed geometry to be directly used in the subsequent preliminary design phase. In particular, the aim of the proposed work is to test the framework by designing, optimizing and studying a transport aircraft wing with respect to aerodynamic, geometry, structural and accessability constraints. The project will provide an initial assessment of the capability of the framework, both in terms of processing speed and accuracy of the results.

  • 200.
    Amadori, Kristian
    et al.
    Linköping University, Department of Management and Engineering, Machine Design. Linköping University, The Institute of Technology.
    Tarkian, Mehdi
    Linköping University, Department of Management and Engineering, Machine Design. Linköping University, The Institute of Technology.
    Ölvander, Johan
    Linköping University, Department of Management and Engineering, Machine Design. Linköping University, The Institute of Technology.
    Krus, Petter
    Linköping University, Department of Management and Engineering, Fluid and Mechatronic Systems. Linköping University, The Institute of Technology.
    Flexible and Robust CAD Models for Design Automation2012In: Advanced Engineering Informatics, ISSN 1474-0346, E-ISSN 1873-5320, Vol. 26, no 2, p. 180-195Article in journal (Refereed)
    Abstract [en]

    This paper explores novel methodologies for enabling Multidisciplinary Design Optimization (MDO) of complex engineering products. To realize MDO, Knowledge Based Engineering (KBE) is adopted with the aim of achieving design reuse and automation. The aim of the on-going research at Linköping University is to shift from manual modelling of disposable geometries to Computer Aided Design (CAD) automation by introducing generic high-level geometry templates. Instead of repeatedly modelling similar instances of objects, engineers should be able to create more general models that can represent entire classes of objects. The proposed methodology enables utilization of commercial design tools, hence taking industrial feasibility into consideration. High Level CAD templates (HLCt) will be proposed and discussed as the building blocks of flexible and robust CAD models, which in turn enables high-fidelity geometry in the MDO loop. Quantification of the terms flexibility and robustness is also presented, providing a means to measure the quality of the geometry models. Finally, application examples are presented in which the outlined framework is evaluated. The applications have been chosen from three ongoing research projects aimed at automating the design of transport aircraft, industrial robots, and micro air vehicles.

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